Skip to content

0046_USB_Camera_udev.md

Latest commit

 

History

History
1244 lines (1174 loc) · 79.4 KB

0046_USB_Camera_udev.md

File metadata and controls

1244 lines (1174 loc) · 79.4 KB

USB_Camera_udev

USB摄像头驱动加载方法

参考文档

make menuconfig

 .config - Linux/arm64 4.19.71 Kernel Configuration
 > Device Drivers > Multimedia support > Media USB Adapters
  ┌─ Media USB Adapters ─┐
  │  Arrow keys navigate the menu.  <Enter> selects submenus ---> (or empty     │
  │  submenus ----).  Highlighted letters are hotkeys.  Pressing <Y> includes,  │
  │  <N> excludes, <M> modularizes features.  Press <Esc><Esc> to exit, <?> for │
  │  Help, </> for Search.  Legend: [*] built-in  [ ] excluded  <M> module  < > │
  │ ┌─┐ │
  │ │    --- Media USB Adapters                                               │ │
  │ │          *** Webcam devices ***                                         │ │
  │ │    <M>   USB Video Class (UVC)                                          │ │
  │ │    [*]     UVC input events device support                              │ │
  │ │    <M>   GSPCA based webcams  --->                                      │ │
  │ │    <M>   USB Philips Cameras                                            │ │
  │ │    [ ]     USB Philips Cameras verbose debug                            │ │
  │ │    [*]     USB Philips Cameras input events device support              │ │
  │ │    <M>   CPiA2 Video For Linux                                          │ │
  │ └─┘ │v(+)
  ├─┤
  │          <Select>    < Exit >    < Help >    < Save >    < Load >           │
  └─┘

uvc module path

drivers/media/usb/uvc/uvcvideo.ko

udev rules简介

  • udev的主配置文件是/etc/udev/udev.conf，udev的主配置文件是/etc/udev/udev.conf。
  • udev的规则文件一般位于/lib/udev/rules.d/，也可以位于/etc/udev/rules.d/。
  • udev规则以管理员身份编写并保存在/etc/udev/rules.d/目录，其文件名必须以.rules结尾。各种软件包提供的规则文件位于/lib/udev/rules.d/。如果/usr/lib和/etc这两个目录中有同名文件，则/etc中的文件优先。
  • 规则文件是按照字母顺序处理的，不管放在哪个目录。对于相同名字的规则文件，/etc/udev/rules.d比/lib/udev/rules.d优先。
  • 规则文件必须以.rules作为扩展名，否则不被当作规则文件。

udev debug:

  • command line open debug info:
    • udevadm control --log-priority=debug
    • udevadm control --reload-rules
  • config open debug info:
    • /etc/udev/udev.conf 
      # see udev.conf(5) for details
#
# udevd is also started in the initrd.  When this file is modified you might
# also want to rebuild the initrd, so that it will include the modified configuration.

#udev_log=info
udev_log=debug
#children_max=
#exec_delay=
#event_timeout=180
#resolve_names=early

uvc module auto insmod

  • check uvc module 
    pi@raspberrypi:~ $ sudo su
root@raspberrypi:/home/pi# lsmod | grep uvc
root@raspberrypi:/home/pi# dmesg | tail
[   24.922487] IPv6: ADDRCONF(NETDEV_UP): usb0: link is not ready
[   25.991948] bcmgenet fd580000.genet eth0: Link is Down
[   30.140766] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[   32.519454] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[   32.519460] Bluetooth: BNEP filters: protocol multicast
[   32.519469] Bluetooth: BNEP socket layer initialized
[   37.229178] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
[   37.236134] Bridge firewalling registered
[   38.425937] IPv6: ADDRCONF(NETDEV_UP): docker0: link is not ready
[   72.018468] fuse init (API version 7.27)
root@raspberrypi:/home/pi# dmesg | tail -n 30
[   10.317755] brcmfmac: power management disabled
[   24.704024] Bluetooth: HCI UART driver ver 2.3
[   24.704040] Bluetooth: HCI UART protocol H4 registered
[   24.704122] Bluetooth: HCI UART protocol Three-wire (H5) registered
[   24.704365] Bluetooth: HCI UART protocol Broadcom registered
[   24.826516] bcmgenet: Skipping UMAC reset
[   24.922027] bcmgenet fd580000.genet: configuring instance for external RGMII (no delay)
[   24.922271] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[   24.922487] IPv6: ADDRCONF(NETDEV_UP): usb0: link is not ready
[   25.991948] bcmgenet fd580000.genet eth0: Link is Down
[   30.140766] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[   32.519454] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[   32.519460] Bluetooth: BNEP filters: protocol multicast
[   32.519469] Bluetooth: BNEP socket layer initialized
[   37.229178] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
[   37.236134] Bridge firewalling registered
[   38.425937] IPv6: ADDRCONF(NETDEV_UP): docker0: link is not ready
[   72.018468] fuse init (API version 7.27)
[  177.289210] usb 1-1.4: new high-speed USB device number 3 using xhci_hcd
[  177.513488] usb 1-1.4: New USB device found, idVendor=057e, idProduct=030a, bcdDevice= 9.24
[  177.513505] usb 1-1.4: New USB device strings: Mfr=48, Product=96, SerialNumber=0
[  177.513517] usb 1-1.4: Product: USB Camera
[  177.513529] usb 1-1.4: Manufacturer: Guillemot Corporation
[  177.619851] uvcvideo: Found UVC 1.00 device USB Camera (057e:030a)
[  177.640566] uvcvideo 1-1.4:1.0: Entity type for entity Extension 4 was not initialized!
[  177.640583] uvcvideo 1-1.4:1.0: Entity type for entity Processing 3 was not initialized!
[  177.640597] uvcvideo 1-1.4:1.0: Entity type for entity Camera 1 was not initialized!
[  177.640964] input: USB Camera: USB Camera as /devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0/input/input1
[  177.641332] usbcore: registered new interface driver uvcvideo
[  177.641342] USB Video Class driver (1.1.1)
root@raspberrypi:/home/pi# lsmod | grep uvc
uvcvideo               98304  0
videobuf2_vmalloc      16384  2 uvcvideo,bcm2835_v4l2
videobuf2_v4l2         24576  4 uvcvideo,bcm2835_codec,bcm2835_v4l2,v4l2_mem2mem
videobuf2_common       45056  5 uvcvideo,bcm2835_codec,bcm2835_v4l2,v4l2_mem2mem,videobuf2_v4l2
videodev              200704  7 uvcvideo,bcm2835_codec,v4l2_common,videobuf2_common,bcm2835_v4l2,v4l2_mem2mem,videobuf2_v4l2
media                  36864  4 uvcvideo,bcm2835_codec,videodev,v4l2_mem2mem
  • /var/log/debug 
    Oct 24 10:32:17 raspberrypi systemd-udevd[143]: 1-1.4: Device (SEQNUM=1572, ACTION=add) is queued
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Validate module index
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Check if link configuration needs reloading.
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: === trie on-disk ===
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: tool version:          241
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: file size:         9875592 bytes
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: header size             80 bytes
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: strings            2072032 bytes
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: nodes              7803480 bytes
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Load module index
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: timestamp of '/etc/systemd/network' changed
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Skipping overridden file '/lib/systemd/network/99-default.link'.
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Skipping empty file: /etc/systemd/network/99-default.link
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Created link configuration context.
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: timestamp of '/etc/udev/rules.d' changed
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: timestamp of '/lib/udev/rules.d' changed
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/10-local-rpi.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/15-i2c-modprobe.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/40-scratch.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/40-usb_modeswitch.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/50-firmware.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/50-udev-default.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/55-dm.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/60-avrdude.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/60-block.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/60-bluealsa.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/60-cdrom_id.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/60-crda.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/60-drm.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/60-evdev.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/60-i2c-tools.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/60-input-id.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/60-libgphoto2-6.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/60-persistent-alsa.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/60-persistent-input.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/60-persistent-storage-dm.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/60-persistent-storage-tape.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/60-persistent-storage.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/60-persistent-v4l.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/60-rpi.gpio-common.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/60-sensor.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/60-serial.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/60-triggerhappy.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/64-btrfs.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/64-xorg-xkb.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/65-libwacom.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/69-libmtp.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/70-joystick.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/70-mouse.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/70-power-switch.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/70-touchpad.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/70-uaccess.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/71-seat.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/73-seat-late.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/73-special-net-names.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/73-usb-net-by-mac.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/75-net-description.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/75-probe_mtd.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/77-mm-cinterion-port-types.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/77-mm-dell-port-types.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/77-mm-ericsson-mbm.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/77-mm-fibocom-port-types.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/77-mm-haier-port-types.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/77-mm-huawei-net-port-types.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/77-mm-longcheer-port-types.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/77-mm-mtk-port-types.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/77-mm-nokia-port-types.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/77-mm-pcmcia-device-blacklist.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/77-mm-qdl-device-blacklist.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/77-mm-sierra.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/77-mm-simtech-port-types.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/77-mm-telit-port-types.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/77-mm-ublox-port-types.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/77-mm-usb-device-blacklist.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/77-mm-usb-serial-adapters-greylist.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/77-mm-x22x-port-types.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/77-mm-zte-port-types.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/78-sound-card.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/80-debian-compat.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/80-drivers.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/80-ifupdown.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/80-iio-sensor-proxy.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/80-libinput-device-groups.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/80-mm-candidate.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/80-net-setup-link.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/80-noobs.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/80-udisks2.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/85-hwclock.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/85-regulatory.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/89-alsa-ucm.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/90-alsa-restore.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/90-console-setup.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/90-libinput-model-quirks.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/90-mu-editor.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/90-pi-bluetooth.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/90-pulseaudio.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/95-dm-notify.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/97-hid2hci.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /etc/udev/rules.d/99-com.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Reading rules file: /lib/udev/rules.d/99-systemd.rules
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Rules contain 393216 bytes tokens (32768 * 12 bytes), 31786 bytes strings
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: 25074 strings (205180 bytes), 22053 de-duplicated (176416 bytes), 3022 trie nodes used
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Successfully forked off 'n/a' as PID 2531.
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: 1-1.4: Worker [2531] is forked for processing SEQNUM=1572.
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: 1-1.4:1.0: Device (SEQNUM=1573, ACTION=add) is queued
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: 1-1.4:1.1: Device (SEQNUM=1574, ACTION=add) is queued
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4: Processing device (SEQNUM=1572, ACTION=add)
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: 1-1.4: Device (SEQNUM=1575, ACTION=bind) is queued
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4: IMPORT builtin 'usb_id' /lib/udev/rules.d/50-udev-default.rules:13
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4: IMPORT builtin 'hwdb' /lib/udev/rules.d/50-udev-default.rules:13
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4: MODE 0664 /lib/udev/rules.d/50-udev-default.rules:45
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4: PROGRAM 'mtp-probe /sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4 1 3' /lib/udev/rules.d/69-libmtp.rules:2541
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: Starting 'mtp-probe /sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4 1 3'
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: Successfully forked off '(spawn)' as PID 2532.
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 'mtp-probe /sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4 1 3'(out) '0'
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: Process 'mtp-probe /sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4 1 3' succeeded.
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4: Handling device node '/dev/bus/usb/001/003', devnum=c189:2, mode=0664, uid=0, gid=0
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4: Setting permissions /dev/bus/usb/001/003, 020664, uid=0, gid=0
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4: Creating symlink '/dev/char/189:2' to '../bus/usb/001/003'
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4: sd-device: Created db file '/run/udev/data/c189:2' for '/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4'
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4: Device (SEQNUM=1572, ACTION=add) processed
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4: sd-device-monitor: Passed 632 byte to netlink monitor
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: 1-1.4:1.0: sd-device-monitor: Passed 341 byte to netlink monitor
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.0: Processing device (SEQNUM=1573, ACTION=add)
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Successfully forked off 'n/a' as PID 2533.
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: 1-1.4:1.1: Worker [2533] is forked for processing SEQNUM=1574.
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.0: IMPORT builtin 'hwdb' /lib/udev/rules.d/50-udev-default.rules:14
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: 1-1.4:1.1: Processing device (SEQNUM=1574, ACTION=add)
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.0: IMPORT builtin 'usb_id' /lib/udev/rules.d/60-libgphoto2-6.rules:9
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: 1-1.4:1.1: IMPORT builtin 'hwdb' /lib/udev/rules.d/50-udev-default.rules:14
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.0: Failed to access usb_interface: No such file or directory
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.0: IMPORT builtin 'usb_id' fails: No such file or directory
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.0: RUN 'kmod load $env{MODALIAS}' /lib/udev/rules.d/80-drivers.rules:5
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.0: sd-device: Created db file '/run/udev/data/+usb:1-1.4:1.0' for '/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0'
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: Loading module: usb:v057Ep030Ad0924dcEFdsc02dp01ic0Eisc01ip00in00
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: 1-1.4:1.1: IMPORT builtin 'usb_id' /lib/udev/rules.d/60-libgphoto2-6.rules:9
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: 1-1.4:1.1: Failed to access usb_interface: No such file or directory
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: 1-1.4:1.1: IMPORT builtin 'usb_id' fails: No such file or directory
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: 1-1.4:1.1: RUN 'kmod load $env{MODALIAS}' /lib/udev/rules.d/80-drivers.rules:5
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: 1-1.4:1.1: sd-device: Created db file '/run/udev/data/+usb:1-1.4:1.1' for '/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.1'
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: Loading module: usb:v057Ep030Ad0924dcEFdsc02dp01ic0Eisc02ip00in01
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: Failed to find module 'usb:v057Ep030Ad0924dcEFdsc02dp01ic0Eisc02ip00in01'
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: 1-1.4:1.1: Device (SEQNUM=1574, ACTION=add) processed
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: 1-1.4:1.1: sd-device-monitor: Passed 483 byte to netlink monitor
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: uvcvideo: Device (SEQNUM=1576, ACTION=add) is queued
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: uvcvideo: sd-device-monitor: Passed 132 byte to netlink monitor
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: uvcvideo: Processing device (SEQNUM=1576, ACTION=add)
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: uvcvideo: Device (SEQNUM=1576, ACTION=add) processed
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: uvcvideo: sd-device-monitor: Passed 132 byte to netlink monitor
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: 1-1.4:1.1: Device (SEQNUM=1577, ACTION=bind) is queued
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: video0: Device (SEQNUM=1578, ACTION=add) is queued
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: video1: Device (SEQNUM=1579, ACTION=add) is queued
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: Inserted module 'uvcvideo'
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.0: Device (SEQNUM=1573, ACTION=add) processed
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: media1: Device (SEQNUM=1580, ACTION=add) is queued
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.0: sd-device-monitor: Passed 483 byte to netlink monitor
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: input1: Device (SEQNUM=1581, ACTION=add) is queued
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: 1-1.4: sd-device-monitor: Passed 333 byte to netlink monitor
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4: Processing device (SEQNUM=1575, ACTION=bind)
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: event1: Device (SEQNUM=1582, ACTION=add) is queued
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: 1-1.4:1.0: Device (SEQNUM=1583, ACTION=bind) is queued
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: uvcvideo: Device (SEQNUM=1584, ACTION=add) is queued
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: uvcvideo: sd-device-monitor: Passed 142 byte to netlink monitor
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4: IMPORT builtin 'usb_id' /lib/udev/rules.d/50-udev-default.rules:13
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: uvcvideo: Processing device (SEQNUM=1584, ACTION=add)
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4: IMPORT builtin 'hwdb' /lib/udev/rules.d/50-udev-default.rules:13
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: uvcvideo: Device (SEQNUM=1584, ACTION=add) processed
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: uvcvideo: sd-device-monitor: Passed 142 byte to netlink monitor
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4: PROGRAM 'mtp-probe /sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4 1 3' /lib/udev/rules.d/69-libmtp.rules:2541
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: Starting 'mtp-probe /sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4 1 3'
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: Successfully forked off '(spawn)' as PID 2534.
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 'mtp-probe /sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4 1 3'(out) '0'
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: Process 'mtp-probe /sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4 1 3' succeeded.
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4: Handling device node '/dev/bus/usb/001/003', devnum=c189:2, mode=0600, uid=0, gid=0
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4: Preserve already existing symlink '/dev/char/189:2' to '../bus/usb/001/003'
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4: sd-device: Created db file '/run/udev/data/c189:2' for '/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4'
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4: Device (SEQNUM=1575, ACTION=bind) processed
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4: sd-device-monitor: Passed 633 byte to netlink monitor
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: 1-1.4:1.1: sd-device-monitor: Passed 358 byte to netlink monitor
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: video0: sd-device-monitor: Passed 274 byte to netlink monitor
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: Processing device (SEQNUM=1578, ACTION=add)
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Successfully forked off 'n/a' as PID 2535.
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.1: Processing device (SEQNUM=1577, ACTION=bind)
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: video1: Worker [2535] is forked for processing SEQNUM=1579.
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.1: IMPORT builtin 'hwdb' /lib/udev/rules.d/50-udev-default.rules:14
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.1: IMPORT builtin 'usb_id' /lib/udev/rules.d/60-libgphoto2-6.rules:9
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Successfully forked off 'n/a' as PID 2536.
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: media1: Worker [2536] is forked for processing SEQNUM=1580.
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: video1: Processing device (SEQNUM=1579, ACTION=add)
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: Successfully forked off 'n/a' as PID 2537.
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: input1: Worker [2537] is forked for processing SEQNUM=1581.
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: GROUP 44 /lib/udev/rules.d/50-udev-default.rules:32
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: IMPORT 'v4l_id /dev/video0' /lib/udev/rules.d/60-persistent-v4l.rules:7
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.1: Failed to access usb_interface: No such file or directory
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.1: IMPORT builtin 'usb_id' fails: No such file or directory
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: Starting 'v4l_id /dev/video0'
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: Successfully forked off '(spawn)' as PID 2538.
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: Processing device (SEQNUM=1581, ACTION=add)
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: IMPORT builtin 'hwdb' /lib/udev/rules.d/50-udev-default.rules:14
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: video1: GROUP 44 /lib/udev/rules.d/50-udev-default.rules:32
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: video1: IMPORT 'v4l_id /dev/video1' /lib/udev/rules.d/60-persistent-v4l.rules:7
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: Starting 'v4l_id /dev/video1'
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.1: sd-device: Created db file '/run/udev/data/+usb:1-1.4:1.1' for '/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.1'
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.1: Device (SEQNUM=1577, ACTION=bind) processed
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.1: sd-device-monitor: Passed 500 byte to netlink monitor
Oct 24 10:32:17 raspberrypi systemd-udevd[2536]: media1: Processing device (SEQNUM=1580, ACTION=add)
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: No entry found from hwdb.
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: IMPORT builtin 'hwdb' fails: No data available
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: IMPORT builtin 'input_id' /lib/udev/rules.d/60-input-id.rules:5
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: capabilities/ev raw kernel attribute: 3
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: capabilities/abs raw kernel attribute: 0
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: capabilities/rel raw kernel attribute: 0
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: capabilities/key raw kernel attribute: 100000 0 0 0 0 0 0
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: properties raw kernel attribute: 0
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: test_key: checking bit block 0 for any keys; found=0
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: test_key: checking bit block 32 for any keys; found=0
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: test_key: checking bit block 64 for any keys; found=0
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: test_key: checking bit block 96 for any keys; found=0
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: test_key: checking bit block 128 for any keys; found=0
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: test_key: checking bit block 160 for any keys; found=0
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: test_key: checking bit block 192 for any keys; found=1
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: test_key: checking bit block 224 for any keys; found=1
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: IMPORT builtin 'hwdb' /lib/udev/rules.d/60-input-id.rules:6
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: No entry found from hwdb.
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: IMPORT builtin 'hwdb' fails: No data available
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: IMPORT builtin 'usb_id' /lib/udev/rules.d/60-persistent-input.rules:11
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: 1-1.4:1.0: if_class:14 protocol:0
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: Successfully forked off '(spawn)' as PID 2539.
Oct 24 10:32:17 raspberrypi systemd-udevd[2536]: media1: GROUP 44 /lib/udev/rules.d/50-udev-default.rules:36
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: IMPORT builtin 'path_id' /lib/udev/rules.d/60-persistent-input.rules:35
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: RUN '/usr/sbin/th-cmd --socket /var/run/thd.socket --passfd --udev' /lib/udev/rules.d/60-triggerhappy.rules:4
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: RUN 'kmod load $env{MODALIAS}' /lib/udev/rules.d/80-drivers.rules:5
Oct 24 10:32:17 raspberrypi systemd-udevd[2536]: media1: Handling device node '/dev/media1', devnum=c237:1, mode=0660, uid=0, gid=44
Oct 24 10:32:17 raspberrypi systemd-udevd[2536]: media1: Setting permissions /dev/media1, 020660, uid=0, gid=44
Oct 24 10:32:17 raspberrypi systemd-udevd[2536]: media1: Creating symlink '/dev/char/237:1' to '../media1'
Oct 24 10:32:17 raspberrypi systemd-udevd[2536]: media1: sd-device: Created empty file '/run/udev/data/c237:1' for '/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0/media1'
Oct 24 10:32:17 raspberrypi systemd-udevd[2536]: media1: Device (SEQNUM=1580, ACTION=add) processed
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: sd-device: Created db file '/run/udev/data/+input:input1' for '/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0/input/input1'
Oct 24 10:32:17 raspberrypi systemd-udevd[2536]: media1: sd-device-monitor: Passed 257 byte to netlink monitor
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: Starting '/usr/sbin/th-cmd --socket /var/run/thd.socket --passfd --udev'
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: 'v4l_id /dev/video0'(out) 'ID_V4L_VERSION=2'
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: 'v4l_id /dev/video0'(out) 'ID_V4L_PRODUCT=USB Camera: USB Camera'
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: 'v4l_id /dev/video0'(out) 'ID_V4L_CAPABILITIES=:capture:'
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: Successfully forked off '(spawn)' as PID 2540.
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: Process 'v4l_id /dev/video0' succeeded.
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: IMPORT builtin 'usb_id' /lib/udev/rules.d/60-persistent-v4l.rules:9
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: 1-1.4:1.0: if_class:14 protocol:0
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: LINK 'v4l/by-id/usb-Guillemot_Corporation_USB_Camera-video-index0' /lib/udev/rules.d/60-persistent-v4l.rules:10
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: IMPORT builtin 'path_id' /lib/udev/rules.d/60-persistent-v4l.rules:16
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: LINK 'v4l/by-path/platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.4:1.0-video-index0' /lib/udev/rules.d/60-persistent-v4l.rules:17
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: RUN 'uaccess' /lib/udev/rules.d/73-seat-late.rules:17
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: Handling device node '/dev/video0', devnum=c81:3, mode=0660, uid=0, gid=44
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: Setting permissions /dev/video0, 020660, uid=0, gid=44
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: Creating symlink '/dev/char/81:3' to '../video0'
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: Creating symlink '/dev/v4l/by-path/platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.4:1.0-video-index0' to '../../video0'
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: Creating symlink '/dev/v4l/by-id/usb-Guillemot_Corporation_USB_Camera-video-index0' to '../../video0'
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: sd-device: Created db file '/run/udev/data/c81:3' for '/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0/video4linux/video0'
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: Device (SEQNUM=1578, ACTION=add) processed
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: sd-device-monitor: Passed 1062 byte to netlink monitor
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: 'v4l_id /dev/video1'(out) 'ID_V4L_VERSION=2'
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: 'v4l_id /dev/video1'(out) 'ID_V4L_PRODUCT=USB Camera: USB Camera'
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: 'v4l_id /dev/video1'(out) 'ID_V4L_CAPABILITIES=:capture:'
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: Process 'v4l_id /dev/video1' succeeded.
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: video1: IMPORT builtin 'usb_id' /lib/udev/rules.d/60-persistent-v4l.rules:9
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: 1-1.4:1.0: if_class:14 protocol:0
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: video1: LINK 'v4l/by-id/usb-Guillemot_Corporation_USB_Camera-video-index1' /lib/udev/rules.d/60-persistent-v4l.rules:10
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: video1: IMPORT builtin 'path_id' /lib/udev/rules.d/60-persistent-v4l.rules:16
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: video1: LINK 'v4l/by-path/platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.4:1.0-video-index1' /lib/udev/rules.d/60-persistent-v4l.rules:17
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: video1: RUN 'uaccess' /lib/udev/rules.d/73-seat-late.rules:17
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: video1: Handling device node '/dev/video1', devnum=c81:4, mode=0660, uid=0, gid=44
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: video1: Setting permissions /dev/video1, 020660, uid=0, gid=44
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: video1: Creating symlink '/dev/char/81:4' to '../video1'
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: video1: Creating symlink '/dev/v4l/by-id/usb-Guillemot_Corporation_USB_Camera-video-index1' to '../../video1'
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: video1: Creating symlink '/dev/v4l/by-path/platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.4:1.0-video-index1' to '../../video1'
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: video1: sd-device: Created db file '/run/udev/data/c81:4' for '/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0/video4linux/video1'
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: Process '/usr/sbin/th-cmd --socket /var/run/thd.socket --passfd --udev' succeeded.
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: video1: Device (SEQNUM=1579, ACTION=add) processed
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: video1: sd-device-monitor: Passed 1062 byte to netlink monitor
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: Loading module: input:b0003v057Ep030Ae0924-e0,1,kD4,ramlsfw
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: Module 'evdev' is already loaded
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: Device (SEQNUM=1581, ACTION=add) processed
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: sd-device-monitor: Passed 957 byte to netlink monitor
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: event1: sd-device-monitor: Passed 276 byte to netlink monitor
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: Processing device (SEQNUM=1582, ACTION=add)
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: GROUP 105 /lib/udev/rules.d/50-udev-default.rules:29
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: IMPORT builtin 'hwdb' /lib/udev/rules.d/60-evdev.rules:8
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: No entry found from hwdb.
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: IMPORT builtin 'hwdb' fails: No data available
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: IMPORT builtin 'hwdb' /lib/udev/rules.d/60-evdev.rules:17
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: No entry found from hwdb.
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: IMPORT builtin 'hwdb' fails: No data available
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: IMPORT builtin 'hwdb' /lib/udev/rules.d/60-evdev.rules:21
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: No entry found from hwdb.
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: IMPORT builtin 'hwdb' fails: No data available
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: IMPORT builtin 'input_id' /lib/udev/rules.d/60-input-id.rules:5
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: input1: capabilities/ev raw kernel attribute: 3
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: input1: capabilities/abs raw kernel attribute: 0
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: input1: capabilities/rel raw kernel attribute: 0
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: input1: capabilities/key raw kernel attribute: 100000 0 0 0 0 0 0
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: input1: properties raw kernel attribute: 0
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: test_key: checking bit block 0 for any keys; found=0
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: test_key: checking bit block 32 for any keys; found=0
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: test_key: checking bit block 64 for any keys; found=0
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: test_key: checking bit block 96 for any keys; found=0
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: test_key: checking bit block 128 for any keys; found=0
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: test_key: checking bit block 160 for any keys; found=0
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: test_key: checking bit block 192 for any keys; found=1
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: test_key: checking bit block 224 for any keys; found=1
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: IMPORT builtin 'hwdb' /lib/udev/rules.d/60-input-id.rules:6
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: No entry found from hwdb.
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: IMPORT builtin 'hwdb' fails: No data available
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: IMPORT builtin 'usb_id' /lib/udev/rules.d/60-persistent-input.rules:11
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.0: if_class:14 protocol:0
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: LINK 'input/by-id/usb-Guillemot_Corporation_USB_Camera-event-if00' /lib/udev/rules.d/60-persistent-input.rules:32
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: IMPORT builtin 'path_id' /lib/udev/rules.d/60-persistent-input.rules:35
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: LINK 'input/by-path/platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.4:1.0-event' /lib/udev/rules.d/60-persistent-input.rules:40
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: RUN '/usr/sbin/th-cmd --socket /var/run/thd.socket --passfd --udev' /lib/udev/rules.d/60-triggerhappy.rules:4
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: PROGRAM 'libinput-device-group /sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0/input/input1/event1' /lib/udev/rules.d/80-libinput-device-groups.rules:7
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: Starting 'libinput-device-group /sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0/input/input1/event1'
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: Successfully forked off '(spawn)' as PID 2541.
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 'libinput-device-group /sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0/input/input1/event1'(out) '3/57e/30a:usb-0000:01:00.0-1'
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: Process 'libinput-device-group /sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0/input/input1/event1' succeeded.
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: GROUP 105 /etc/udev/rules.d/99-com.rules:1
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: MODE 0660 /etc/udev/rules.d/99-com.rules:1
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: Handling device node '/dev/input/event1', devnum=c13:65, mode=0660, uid=0, gid=105
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: Setting permissions /dev/input/event1, 020660, uid=0, gid=105
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: Creating symlink '/dev/char/13:65' to '../input/event1'
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: Creating symlink '/dev/input/by-id/usb-Guillemot_Corporation_USB_Camera-event-if00' to '../event1'
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: Creating symlink '/dev/input/by-path/platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.4:1.0-event' to '../event1'
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: sd-device: Created db file '/run/udev/data/c13:65' for '/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0/input/input1/event1'
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: Starting '/usr/sbin/th-cmd --socket /var/run/thd.socket --passfd --udev'
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: Successfully forked off '(spawn)' as PID 2542.
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: Device (SEQNUM=1582, ACTION=add) processed
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: event1: sd-device-monitor: Passed 1041 byte to netlink monitor
Oct 24 10:32:17 raspberrypi systemd-udevd[143]: 1-1.4:1.0: sd-device-monitor: Passed 358 byte to netlink monitor
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.0: Processing device (SEQNUM=1583, ACTION=bind)
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.0: IMPORT builtin 'hwdb' /lib/udev/rules.d/50-udev-default.rules:14
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.0: IMPORT builtin 'usb_id' /lib/udev/rules.d/60-libgphoto2-6.rules:9
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.0: Failed to access usb_interface: No such file or directory
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.0: IMPORT builtin 'usb_id' fails: No such file or directory
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.0: sd-device: Created db file '/run/udev/data/+usb:1-1.4:1.0' for '/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0'
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.0: Device (SEQNUM=1583, ACTION=bind) processed
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.0: sd-device-monitor: Passed 500 byte to netlink monitor
Oct 24 10:32:21 raspberrypi systemd-udevd[143]: Cleanup idle workers
Oct 24 10:32:21 raspberrypi systemd-udevd[2535]: Unload module index
Oct 24 10:32:21 raspberrypi systemd-udevd[2537]: Unload module index
Oct 24 10:32:21 raspberrypi systemd-udevd[2535]: Unloaded link configuration context.
Oct 24 10:32:21 raspberrypi systemd-udevd[2537]: Unloaded link configuration context.
Oct 24 10:32:21 raspberrypi systemd-udevd[2536]: Unload module index
Oct 24 10:32:21 raspberrypi systemd-udevd[2533]: Unload module index
Oct 24 10:32:21 raspberrypi systemd-udevd[2536]: Unloaded link configuration context.
Oct 24 10:32:21 raspberrypi systemd-udevd[2533]: Unloaded link configuration context.
Oct 24 10:32:21 raspberrypi systemd-udevd[143]: Worker [2537] exited
Oct 24 10:32:21 raspberrypi systemd-udevd[143]: Worker [2533] exited
Oct 24 10:32:21 raspberrypi systemd-udevd[143]: Worker [2536] exited
Oct 24 10:32:21 raspberrypi systemd-udevd[2531]: Unload module index
Oct 24 10:32:21 raspberrypi systemd-udevd[2531]: Unloaded link configuration context.
Oct 24 10:32:21 raspberrypi systemd-udevd[143]: Worker [2535] exited
Oct 24 10:32:21 raspberrypi systemd-udevd[143]: Worker [2531] exited

99-com.rules hacking

  • /etc/udev/rules.d/99-com.rules 
    SUBSYSTEM=="input", GROUP="input", MODE="0660"
SUBSYSTEM=="i2c-dev", GROUP="i2c", MODE="0660"
SUBSYSTEM=="spidev", GROUP="spi", MODE="0660"
SUBSYSTEM=="bcm2835-gpiomem", GROUP="gpio", MODE="0660"

SUBSYSTEM=="gpio", GROUP="gpio", MODE="0660"
SUBSYSTEM=="gpio*", PROGRAM="/bin/sh -c '\
        chown -R root:gpio /sys/class/gpio && chmod -R 770 /sys/class/gpio;\
        chown -R root:gpio /sys/devices/virtual/gpio && chmod -R 770 /sys/devices/virtual/gpio;\
        chown -R root:gpio /sys$devpath && chmod -R 770 /sys$devpath\
'"

KERNEL=="ttyAMA[01]", PROGRAM="/bin/sh -c '\
        ALIASES=/proc/device-tree/aliases; \
        if cmp -s $ALIASES/uart0 $ALIASES/serial0; then \
                echo 0;\
        elif cmp -s $ALIASES/uart0 $ALIASES/serial1; then \
                echo 1; \
        else \
                exit 1; \
        fi\
'", SYMLINK+="serial%c"

KERNEL=="ttyS0", PROGRAM="/bin/sh -c '\
        ALIASES=/proc/device-tree/aliases; \
        if cmp -s $ALIASES/uart1 $ALIASES/serial0; then \
                echo 0; \
        elif cmp -s $ALIASES/uart1 $ALIASES/serial1; then \
                echo 1; \
        else \
                exit 1; \
        fi \
'", SYMLINK+="serial%c"
  • SUBSYSTEM=="input", GROUP="input", MODE="0660"
    • udevadm info -q all -a /dev/input/mice 
      Udevadm info starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.

  looking at device '/devices/virtual/input/mice':
    KERNEL=="mice"
    SUBSYSTEM=="input"
    DRIVER==""
    • ls -al /dev/input/* 
      crw-rw----  1 root input 13, 64 Oct 25 10:17 event0
crw-rw----  1 root input 13, 63 Oct 25 10:17 mice
  • SUBSYSTEM=="i2c-dev", GROUP="i2c", MODE="0660"
    • udevadm info -q all -a /dev/i2c-1 
      Udevadm info starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.

  looking at device '/devices/platform/soc/fe804000.i2c/i2c-1/i2c-dev/i2c-1':
    KERNEL=="i2c-1"
    SUBSYSTEM=="i2c-dev"
    DRIVER==""
    ATTR{name}=="bcm2835 I2C adapter"

  looking at parent device '/devices/platform/soc/fe804000.i2c/i2c-1':
    KERNELS=="i2c-1"
    SUBSYSTEMS=="i2c"
    DRIVERS==""
    ATTRS{name}=="bcm2835 I2C adapter"

  looking at parent device '/devices/platform/soc/fe804000.i2c':
    KERNELS=="fe804000.i2c"
    SUBSYSTEMS=="platform"
    DRIVERS=="i2c-bcm2835"
    ATTRS{driver_override}=="(null)"

  looking at parent device '/devices/platform/soc':
    KERNELS=="soc"
    SUBSYSTEMS=="platform"
    DRIVERS==""
    ATTRS{driver_override}=="(null)"

  looking at parent device '/devices/platform':
    KERNELS=="platform"
    SUBSYSTEMS==""
    DRIVERS==""
    • ls -al /dev/i2c-1 
      crw-rw---- 1 root i2c 89, 1 Oct 25 10:17 /dev/i2c-1

查看usb camera设备信息

  • udevadm info -a -p $(udevadm info -q path -n /dev/video0) 
    Udevadm info starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.

  looking at device '//devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0/video4linux/video0':
    KERNEL=="video0"
    SUBSYSTEM=="video4linux"
    DRIVER==""
    ATTR{name}=="USB Camera: USB Camera"
    ATTR{dev_debug}=="0"
    ATTR{index}=="0"

  looking at parent device '//devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0':
    KERNELS=="1-1.4:1.0"
    SUBSYSTEMS=="usb"
    DRIVERS=="uvcvideo"
    ATTRS{iad_bFunctionSubClass}=="03"
    ATTRS{supports_autosuspend}=="1"
    ATTRS{bInterfaceNumber}=="00"
    ATTRS{bInterfaceSubClass}=="01"
    ATTRS{iad_bFunctionClass}=="0e"
    ATTRS{bAlternateSetting}==" 0"
    ATTRS{iad_bFirstInterface}=="00"
    ATTRS{interface}=="USB Camera"
    ATTRS{bInterfaceProtocol}=="00"
    ATTRS{iad_bFunctionProtocol}=="00"
    ATTRS{bInterfaceClass}=="0e"
    ATTRS{authorized}=="1"
    ATTRS{bNumEndpoints}=="01"
    ATTRS{iad_bInterfaceCount}=="02"

  looking at parent device '//devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4':
    KERNELS=="1-1.4"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bmAttributes}=="80"
    ATTRS{quirks}=="0x0"
    ATTRS{maxchild}=="0"
    ATTRS{devnum}=="3"
    ATTRS{authorized}=="1"
    ATTRS{tx_lanes}=="1"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{configuration}=="Guillemot Corporation"
    ATTRS{rx_lanes}=="1"
    ATTRS{product}=="USB Camera"
    ATTRS{removable}=="unknown"
    ATTRS{idProduct}=="030a"
    ATTRS{speed}=="480"
    ATTRS{bDeviceSubClass}=="02"
    ATTRS{bDeviceProtocol}=="01"
    ATTRS{devspec}=="  (null)"
    ATTRS{idVendor}=="057e"
    ATTRS{bcdDevice}=="0924"
    ATTRS{urbnum}=="29"
    ATTRS{busnum}=="1"
    ATTRS{ltm_capable}=="no"
    ATTRS{devpath}=="1.4"
    ATTRS{bMaxPower}=="500mA"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bDeviceClass}=="ef"
    ATTRS{bNumInterfaces}==" 2"
    ATTRS{version}==" 2.00"
    ATTRS{manufacturer}=="Guillemot Corporation"
    ATTRS{bMaxPacketSize0}=="64"

  looking at parent device '//devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1':
    KERNELS=="1-1"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{urbnum}=="40"
    ATTRS{version}==" 2.10"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{devspec}=="  (null)"
    ATTRS{rx_lanes}=="1"
    ATTRS{idVendor}=="2109"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{speed}=="480"
    ATTRS{bDeviceProtocol}=="01"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bMaxPower}=="100mA"
    ATTRS{busnum}=="1"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{maxchild}=="4"
    ATTRS{bDeviceClass}=="09"
    ATTRS{bcdDevice}=="0420"
    ATTRS{idProduct}=="3431"
    ATTRS{bmAttributes}=="e0"
    ATTRS{product}=="USB2.0 Hub"
    ATTRS{quirks}=="0x0"
    ATTRS{removable}=="unknown"
    ATTRS{tx_lanes}=="1"
    ATTRS{devnum}=="2"
    ATTRS{devpath}=="1"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{ltm_capable}=="no"
    ATTRS{configuration}==""
    ATTRS{authorized}=="1"
    ATTRS{bMaxPacketSize0}=="64"

  looking at parent device '//devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1':
    KERNELS=="usb1"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{idProduct}=="0002"
    ATTRS{devspec}=="  (null)"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{quirks}=="0x0"
    ATTRS{product}=="xHCI Host Controller"
    ATTRS{authorized_default}=="1"
    ATTRS{devpath}=="0"
    ATTRS{speed}=="480"
    ATTRS{manufacturer}=="Linux 4.19.71-v7l xhci-hcd"
    ATTRS{rx_lanes}=="1"
    ATTRS{authorized}=="1"
    ATTRS{devnum}=="1"
    ATTRS{urbnum}=="32"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{removable}=="unknown"
    ATTRS{maxchild}=="1"
    ATTRS{tx_lanes}=="1"
    ATTRS{bDeviceClass}=="09"
    ATTRS{idVendor}=="1d6b"
    ATTRS{configuration}==""
    ATTRS{bNumConfigurations}=="1"
    ATTRS{version}==" 2.00"
    ATTRS{ltm_capable}=="no"
    ATTRS{bmAttributes}=="e0"
    ATTRS{bMaxPower}=="0mA"
    ATTRS{bDeviceProtocol}=="01"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{serial}=="0000:01:00.0"
    ATTRS{bcdDevice}=="0419"
    ATTRS{busnum}=="1"
    ATTRS{interface_authorized_default}=="1"

  looking at parent device '//devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0':
    KERNELS=="0000:01:00.0"
    SUBSYSTEMS=="pci"
    DRIVERS=="xhci_hcd"
    ATTRS{max_link_speed}=="5 GT/s"
    ATTRS{class}=="0x0c0330"
    ATTRS{broken_parity_status}=="0"
    ATTRS{revision}=="0x01"
    ATTRS{subsystem_device}=="0x3483"
    ATTRS{max_link_width}=="1"
    ATTRS{current_link_speed}=="5 GT/s"
    ATTRS{dma_mask_bits}=="64"
    ATTRS{driver_override}=="(null)"
    ATTRS{devspec}==""
    ATTRS{irq}=="56"
    ATTRS{enable}=="1"
    ATTRS{consistent_dma_mask_bits}=="64"
    ATTRS{local_cpulist}=="0-3"
    ATTRS{local_cpus}=="f"
    ATTRS{ari_enabled}=="0"
    ATTRS{device}=="0x3483"
    ATTRS{current_link_width}=="1"
    ATTRS{msi_bus}=="1"
    ATTRS{vendor}=="0x1106"
    ATTRS{subsystem_vendor}=="0x1106"

  looking at parent device '//devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0':
    KERNELS=="0000:00:00.0"
    SUBSYSTEMS=="pci"
    DRIVERS=="pcieport"
    ATTRS{irq}=="55"
    ATTRS{broken_parity_status}=="0"
    ATTRS{subordinate_bus_number}=="1"
    ATTRS{dma_mask_bits}=="32"
    ATTRS{secondary_bus_number}=="1"
    ATTRS{vendor}=="0x14e4"
    ATTRS{devspec}==""
    ATTRS{subsystem_vendor}=="0x0000"
    ATTRS{device}=="0x2711"
    ATTRS{revision}=="0x10"
    ATTRS{max_link_speed}=="5 GT/s"
    ATTRS{driver_override}=="(null)"
    ATTRS{enable}=="1"
    ATTRS{msi_bus}=="1"
    ATTRS{class}=="0x060400"
    ATTRS{aer_rootport_total_err_nonfatal}=="0"
    ATTRS{subsystem_device}=="0x0000"
    ATTRS{current_link_speed}=="5 GT/s"
    ATTRS{local_cpulist}=="0-3"
    ATTRS{current_link_width}=="1"
    ATTRS{max_link_width}=="1"
    ATTRS{local_cpus}=="f"
    ATTRS{consistent_dma_mask_bits}=="32"
    ATTRS{ari_enabled}=="0"
    ATTRS{aer_rootport_total_err_cor}=="0"
    ATTRS{aer_rootport_total_err_fatal}=="0"

  looking at parent device '//devices/platform/scb/fd500000.pcie/pci0000:00':
    KERNELS=="pci0000:00"
    SUBSYSTEMS==""
    DRIVERS==""

  looking at parent device '//devices/platform/scb/fd500000.pcie':
    KERNELS=="fd500000.pcie"
    SUBSYSTEMS=="platform"
    DRIVERS=="brcm-pcie"
    ATTRS{dmabounce_stats}=="m:0/0 s:0/0 f:0 s:0 b:0/0 a:0/0"
    ATTRS{driver_override}=="(null)"

  looking at parent device '//devices/platform/scb':
    KERNELS=="scb"
    SUBSYSTEMS=="platform"
    DRIVERS==""
    ATTRS{driver_override}=="(null)"

  looking at parent device '//devices/platform':
    KERNELS=="platform"
    SUBSYSTEMS==""
    DRIVERS==""

udevadm监听USB Camera设备插入输出信息

  • udevadm monitor --environment --udev 
    monitor will print the received events for:
UDEV - the event which udev sends out after rule processing


UDEV  [4816.062264] add      /devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4 (usb)
ACTION=add
DEVPATH=/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4
SUBSYSTEM=usb
DEVNAME=/dev/bus/usb/001/003
DEVTYPE=usb_device
PRODUCT=57e/30a/924
TYPE=239/2/1
BUSNUM=001
DEVNUM=003
SEQNUM=1573
USEC_INITIALIZED=4816060935
ID_VENDOR=Guillemot_Corporation
ID_VENDOR_ENC=Guillemot\x20Corporation
ID_VENDOR_ID=057e
ID_MODEL=USB_Camera
ID_MODEL_ENC=USB\x20Camera
ID_MODEL_ID=030a
ID_REVISION=0924
ID_SERIAL=Guillemot_Corporation_USB_Camera
ID_BUS=usb
ID_USB_INTERFACES=:0e0100:0e0200:
ID_VENDOR_FROM_DATABASE=Nintendo Co., Ltd
DRIVER=usb
MAJOR=189
MINOR=2

UDEV  [4816.082045] add      /devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.1 (usb)
ACTION=add
DEVPATH=/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.1
SUBSYSTEM=usb
DEVTYPE=usb_interface
PRODUCT=57e/30a/924
TYPE=239/2/1
INTERFACE=14/2/0
MODALIAS=usb:v057Ep030Ad0924dcEFdsc02dp01ic0Eisc02ip00in01
SEQNUM=1575
USEC_INITIALIZED=4816080724
ID_USB_CLASS_FROM_DATABASE=Miscellaneous Device
ID_USB_PROTOCOL_FROM_DATABASE=Interface Association
ID_VENDOR_FROM_DATABASE=Nintendo Co., Ltd

UDEV  [4816.095431] add      /module/uvcvideo (module)
ACTION=add
DEVPATH=/module/uvcvideo
SUBSYSTEM=module
SEQNUM=1577
USEC_INITIALIZED=4816095112

UDEV  [4816.115822] add      /devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0 (usb)
ACTION=add
DEVPATH=/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0
SUBSYSTEM=usb
DEVTYPE=usb_interface
PRODUCT=57e/30a/924
TYPE=239/2/1
INTERFACE=14/1/0
MODALIAS=usb:v057Ep030Ad0924dcEFdsc02dp01ic0Eisc01ip00in00
SEQNUM=1574
USEC_INITIALIZED=4816075377
ID_USB_CLASS_FROM_DATABASE=Miscellaneous Device
ID_USB_PROTOCOL_FROM_DATABASE=Interface Association
ID_VENDOR_FROM_DATABASE=Nintendo Co., Ltd

UDEV  [4816.117617] add      /bus/usb/drivers/uvcvideo (drivers)
ACTION=add
DEVPATH=/bus/usb/drivers/uvcvideo
SUBSYSTEM=drivers
SEQNUM=1585
USEC_INITIALIZED=4816117456

UDEV  [4816.134049] bind     /devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4 (usb)
ACTION=bind
DEVPATH=/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4
SUBSYSTEM=usb
DEVNAME=/dev/bus/usb/001/003
DEVTYPE=usb_device
DRIVER=usb
PRODUCT=57e/30a/924
TYPE=239/2/1
BUSNUM=001
DEVNUM=003
SEQNUM=1576
USEC_INITIALIZED=4816060935
ID_VENDOR=Guillemot_Corporation
ID_VENDOR_ENC=Guillemot\x20Corporation
ID_VENDOR_ID=057e
ID_MODEL=USB_Camera
ID_MODEL_ENC=USB\x20Camera
ID_MODEL_ID=030a
ID_REVISION=0924
ID_SERIAL=Guillemot_Corporation_USB_Camera
ID_BUS=usb
ID_USB_INTERFACES=:0e0100:0e0200:
ID_VENDOR_FROM_DATABASE=Nintendo Co., Ltd
MAJOR=189
MINOR=2

UDEV  [4816.140526] bind     /devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.1 (usb)
ACTION=bind
DEVPATH=/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.1
SUBSYSTEM=usb
DEVTYPE=usb_interface
DRIVER=uvcvideo
PRODUCT=57e/30a/924
TYPE=239/2/1
INTERFACE=14/2/0
MODALIAS=usb:v057Ep030Ad0924dcEFdsc02dp01ic0Eisc02ip00in01
SEQNUM=1578
USEC_INITIALIZED=4816080724
ID_USB_CLASS_FROM_DATABASE=Miscellaneous Device
ID_USB_PROTOCOL_FROM_DATABASE=Interface Association
ID_VENDOR_FROM_DATABASE=Nintendo Co., Ltd

UDEV  [4816.146230] add      /devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0/media1 (media)
ACTION=add
DEVPATH=/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0/media1
SUBSYSTEM=media
DEVNAME=/dev/media1
SEQNUM=1581
USEC_INITIALIZED=4816145917
MAJOR=237
MINOR=1

UDEV  [4816.157084] add      /devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0/video4linux/video0 (video4linux)
ACTION=add
DEVPATH=/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0/video4linux/video0
SUBSYSTEM=video4linux
DEVNAME=/dev/video0
SEQNUM=1579
USEC_INITIALIZED=4816156333
ID_V4L_VERSION=2
ID_V4L_PRODUCT=USB Camera: USB Camera
ID_V4L_CAPABILITIES=:capture:
ID_VENDOR=Guillemot_Corporation
ID_VENDOR_ENC=Guillemot\x20Corporation
ID_VENDOR_ID=057e
ID_MODEL=USB_Camera
ID_MODEL_ENC=USB\x20Camera
ID_MODEL_ID=030a
ID_REVISION=0924
ID_SERIAL=Guillemot_Corporation_USB_Camera
ID_TYPE=video
ID_BUS=usb
ID_USB_INTERFACES=:0e0100:0e0200:
ID_USB_INTERFACE_NUM=00
ID_USB_DRIVER=uvcvideo
ID_PATH=platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.4:1.0
ID_PATH_TAG=platform-fd500000_pcie-pci-0000_01_00_0-usb-0_1_4_1_0
ID_FOR_SEAT=video4linux-platform-fd500000_pcie-pci-0000_01_00_0-usb-0_1_4_1_0
MAJOR=81
MINOR=3
DEVLINKS=/dev/v4l/by-id/usb-Guillemot_Corporation_USB_Camera-video-index0 /dev/v4l/by-path/platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.4:1.0-video-index0
TAGS=:uaccess:seat:

UDEV  [4816.159222] add      /devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0/video4linux/video1 (video4linux)
ACTION=add
DEVPATH=/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0/video4linux/video1
SUBSYSTEM=video4linux
DEVNAME=/dev/video1
SEQNUM=1580
USEC_INITIALIZED=4816158093
ID_V4L_VERSION=2
ID_V4L_PRODUCT=USB Camera: USB Camera
ID_V4L_CAPABILITIES=:capture:
ID_VENDOR=Guillemot_Corporation
ID_VENDOR_ENC=Guillemot\x20Corporation
ID_VENDOR_ID=057e
ID_MODEL=USB_Camera
ID_MODEL_ENC=USB\x20Camera
ID_MODEL_ID=030a
ID_REVISION=0924
ID_SERIAL=Guillemot_Corporation_USB_Camera
ID_TYPE=video
ID_BUS=usb
ID_USB_INTERFACES=:0e0100:0e0200:
ID_USB_INTERFACE_NUM=00
ID_USB_DRIVER=uvcvideo
ID_PATH=platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.4:1.0
ID_PATH_TAG=platform-fd500000_pcie-pci-0000_01_00_0-usb-0_1_4_1_0
ID_FOR_SEAT=video4linux-platform-fd500000_pcie-pci-0000_01_00_0-usb-0_1_4_1_0
MAJOR=81
MINOR=4
DEVLINKS=/dev/v4l/by-path/platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.4:1.0-video-index1 /dev/v4l/by-id/usb-Guillemot_Corporation_USB_Camera-video-index1
TAGS=:uaccess:seat:

UDEV  [4816.165386] add      /devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0/input/input1 (input)
ACTION=add
DEVPATH=/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0/input/input1
SUBSYSTEM=input
PRODUCT=3/57e/30a/924
NAME="USB Camera: USB Camera"
PHYS="usb-0000:01:00.0-1.4/button"
PROP=0
EV=3
KEY=100000 0 0 0 0 0 0
MODALIAS=input:b0003v057Ep030Ae0924-e0,1,kD4,ramlsfw
SEQNUM=1582
USEC_INITIALIZED=4816149568
ID_INPUT=1
ID_INPUT_KEY=1
ID_VENDOR=Guillemot_Corporation
ID_VENDOR_ENC=Guillemot\x20Corporation
ID_VENDOR_ID=057e
ID_MODEL=USB_Camera
ID_MODEL_ENC=USB\x20Camera
ID_MODEL_ID=030a
ID_REVISION=0924
ID_SERIAL=Guillemot_Corporation_USB_Camera
ID_TYPE=video
ID_BUS=usb
ID_USB_INTERFACES=:0e0100:0e0200:
ID_USB_INTERFACE_NUM=00
ID_USB_DRIVER=uvcvideo
ID_PATH=platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.4:1.0
ID_PATH_TAG=platform-fd500000_pcie-pci-0000_01_00_0-usb-0_1_4_1_0
ID_FOR_SEAT=input-platform-fd500000_pcie-pci-0000_01_00_0-usb-0_1_4_1_0
TAGS=:seat:

UDEV  [4816.390789] add      /devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0/input/input1/event1 (input)
ACTION=add
DEVPATH=/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0/input/input1/event1
SUBSYSTEM=input
DEVNAME=/dev/input/event1
SEQNUM=1583
USEC_INITIALIZED=4816286548
ID_INPUT=1
ID_INPUT_KEY=1
ID_VENDOR=Guillemot_Corporation
ID_VENDOR_ENC=Guillemot\x20Corporation
ID_VENDOR_ID=057e
ID_MODEL=USB_Camera
ID_MODEL_ENC=USB\x20Camera
ID_MODEL_ID=030a
ID_REVISION=0924
ID_SERIAL=Guillemot_Corporation_USB_Camera
ID_TYPE=video
ID_BUS=usb
ID_USB_INTERFACES=:0e0100:0e0200:
ID_USB_INTERFACE_NUM=00
ID_USB_DRIVER=uvcvideo
ID_PATH=platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.4:1.0
ID_PATH_TAG=platform-fd500000_pcie-pci-0000_01_00_0-usb-0_1_4_1_0
XKBMODEL=pc105
XKBLAYOUT=us
XKBVARIANT=
XKBOPTIONS=
BACKSPACE=guess
LIBINPUT_DEVICE_GROUP=3/57e/30a:usb-0000:01:00.0-1
MAJOR=13
MINOR=65
DEVLINKS=/dev/input/by-path/platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.4:1.0-event /dev/input/by-id/usb-Guillemot_Corporation_USB_Camera-event-if00
TAGS=:power-switch:

UDEV  [4816.396840] bind     /devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0 (usb)
ACTION=bind
DEVPATH=/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0
SUBSYSTEM=usb
DEVTYPE=usb_interface
DRIVER=uvcvideo
PRODUCT=57e/30a/924
TYPE=239/2/1
INTERFACE=14/1/0
MODALIAS=usb:v057Ep030Ad0924dcEFdsc02dp01ic0Eisc01ip00in00
SEQNUM=1584
USEC_INITIALIZED=4816075377
ID_USB_CLASS_FROM_DATABASE=Miscellaneous Device
ID_USB_PROTOCOL_FROM_DATABASE=Interface Association
ID_VENDOR_FROM_DATABASE=Nintendo Co., Ltd

60-persistent-v4l.rules跟踪

  • /lib/udev/rules.d/60-persistent-v4l.rules 
    # do not edit this file, it will be overwritten on update

ACTION=="remove", GOTO="persistent_v4l_end"                                         # 如果是移除信息就跳转到该文件最后
SUBSYSTEM!="video4linux", GOTO="persistent_v4l_end"                                 # 如果不是video4linux，跳转到文件最后
ENV{MAJOR}=="", GOTO="persistent_v4l_end"                                           # 如果主设备号为空，跳转到文件最后

IMPORT{program}="v4l_id $devnode"

SUBSYSTEMS=="usb", IMPORT{builtin}="usb_id"
KERNEL=="video*", ENV{ID_SERIAL}=="?*", SYMLINK+="v4l/by-id/$env{ID_BUS}-$env{ID_SERIAL}-video-index$attr{index}"

# check for valid "index" number
TEST!="index", GOTO="persistent_v4l_end"
ATTR{index}!="?*", GOTO="persistent_v4l_end"

IMPORT{builtin}="path_id"
ENV{ID_PATH}=="?*", KERNEL=="video*|vbi*", SYMLINK+="v4l/by-path/$env{ID_PATH}-video-index$attr{index}"
ENV{ID_PATH}=="?*", KERNEL=="audio*", SYMLINK+="v4l/by-path/$env{ID_PATH}-audio-index$attr{index}"

LABEL="persistent_v4l_end"
  • /var/log/debug 
    [...省略]
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: IMPORT 'v4l_id /dev/video0' /lib/udev/rules.d/60-persistent-v4l.rules:7
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.1: Failed to access usb_interface: No such file or directory
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.1: IMPORT builtin 'usb_id' fails: No such file or directory
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: Starting 'v4l_id /dev/video0'
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: Successfully forked off '(spawn)' as PID 2538.
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: Processing device (SEQNUM=1581, ACTION=add)
Oct 24 10:32:17 raspberrypi systemd-udevd[2537]: input1: IMPORT builtin 'hwdb' /lib/udev/rules.d/50-udev-default.rules:14
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: video1: GROUP 44 /lib/udev/rules.d/50-udev-default.rules:32
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: video1: IMPORT 'v4l_id /dev/video1' /lib/udev/rules.d/60-persistent-v4l.rules:7
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: Starting 'v4l_id /dev/video1'
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.1: sd-device: Created db file '/run/udev/data/+usb:1-1.4:1.1' for '/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.1'
[...省略]
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: Process 'v4l_id /dev/video0' succeeded.
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: IMPORT builtin 'usb_id' /lib/udev/rules.d/60-persistent-v4l.rules:9
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: 1-1.4:1.0: if_class:14 protocol:0
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: LINK 'v4l/by-id/usb-Guillemot_Corporation_USB_Camera-video-index0' /lib/udev/rules.d/60-persistent-v4l.rules:10
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: IMPORT builtin 'path_id' /lib/udev/rules.d/60-persistent-v4l.rules:16
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: LINK 'v4l/by-path/platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.4:1.0-video-index0' /lib/udev/rules.d/60-persistent-v4l.rules:17
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: RUN 'uaccess' /lib/udev/rules.d/73-seat-late.rules:17
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: Handling device node '/dev/video0', devnum=c81:3, mode=0660, uid=0, gid=44
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: Setting permissions /dev/video0, 020660, uid=0, gid=44
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: Creating symlink '/dev/char/81:3' to '../video0'
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: Creating symlink '/dev/v4l/by-path/platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.4:1.0-video-index0' to '../../video0'
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: Creating symlink '/dev/v4l/by-id/usb-Guillemot_Corporation_USB_Camera-video-index0' to '../../video0'
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: sd-device: Created db file '/run/udev/data/c81:3' for '/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0/video4linux/video0'
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: Device (SEQNUM=1578, ACTION=add) processed
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: video0: sd-device-monitor: Passed 1062 byte to netlink monitor
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: 'v4l_id /dev/video1'(out) 'ID_V4L_VERSION=2'
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: 'v4l_id /dev/video1'(out) 'ID_V4L_PRODUCT=USB Camera: USB Camera'
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: 'v4l_id /dev/video1'(out) 'ID_V4L_CAPABILITIES=:capture:'
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: Process 'v4l_id /dev/video1' succeeded.
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: video1: IMPORT builtin 'usb_id' /lib/udev/rules.d/60-persistent-v4l.rules:9
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: 1-1.4:1.0: if_class:14 protocol:0
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: video1: LINK 'v4l/by-id/usb-Guillemot_Corporation_USB_Camera-video-index1' /lib/udev/rules.d/60-persistent-v4l.rules:10
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: video1: IMPORT builtin 'path_id' /lib/udev/rules.d/60-persistent-v4l.rules:16
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: video1: LINK 'v4l/by-path/platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.4:1.0-video-index1' /lib/udev/rules.d/60-persistent-v4l.rules:17
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: video1: RUN 'uaccess' /lib/udev/rules.d/73-seat-late.rules:17
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: video1: Handling device node '/dev/video1', devnum=c81:4, mode=0660, uid=0, gid=44
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: video1: Setting permissions /dev/video1, 020660, uid=0, gid=44
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: video1: Creating symlink '/dev/char/81:4' to '../video1'
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: video1: Creating symlink '/dev/v4l/by-id/usb-Guillemot_Corporation_USB_Camera-video-index1' to '../../video1'
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: video1: Creating symlink '/dev/v4l/by-path/platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.4:1.0-video-index1' to '../../video1'
Oct 24 10:32:17 raspberrypi systemd-udevd[2535]: video1: sd-device: Created db file '/run/udev/data/c81:4' for '/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0/video4linux/video1'
[...省略]

80-drivers.rules跟踪

  • /lib/udev/rules.d/80-drivers.rules 
    # do not edit this file, it will be overwritten on update

ACTION!="add", GOTO="drivers_end"                                               # 不是add，就跳转到本文件最后

ENV{MODALIAS}=="?*", RUN{builtin}+="kmod load $env{MODALIAS}"
SUBSYSTEM=="tifm", ENV{TIFM_CARD_TYPE}=="SD", RUN{builtin}+="kmod load tifm_sd"
SUBSYSTEM=="tifm", ENV{TIFM_CARD_TYPE}=="MS", RUN{builtin}+="kmod load tifm_ms"
SUBSYSTEM=="memstick", RUN{builtin}+="kmod load ms_block mspro_block"
SUBSYSTEM=="i2o", RUN{builtin}+="kmod load i2o_block"
SUBSYSTEM=="module", KERNEL=="parport_pc", RUN{builtin}+="kmod load ppdev"
KERNEL=="mtd*ro", ENV{MTD_FTL}=="smartmedia", RUN{builtin}+="kmod load sm_ftl"

LABEL="drivers_end"
  • /var/log/debug 
    [...省略]
Oct 24 10:32:17 raspberrypi systemd-udevd[2533]: 1-1.4:1.1: RUN 'kmod load $env{MODALIAS}' /lib/udev/rules.d/80-drivers.rules:5
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: 1-1.4:1.0: sd-device: Created db file '/run/udev/data/+usb:1-1.4:1.0' for '/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0'
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: Loading module: usb:v057Ep030Ad0924dcEFdsc02dp01ic0Eisc01ip00in00
[...省略]
Oct 24 10:32:17 raspberrypi systemd-udevd[2531]: Inserted module 'uvcvideo'
[...省略]
  • /etc/init.d/kmod 
    load_module() {
  local module args
  module="$1"
  args="$2"

  if [ "$VERBOSE" != no ]; then
    log_action_msg "Loading kernel module $module"
    modprobe $module $args || true
  else
    modprobe $module $args > /dev/null 2>&1 || true
  fi
}
  • modprobe usb:v057Ep030Ad0924dcEFdsc02dp01ic0Eisc01ip00in00 
    root@raspberrypi:/home/pi# lsmod | grep uvc
root@raspberrypi:/home/pi# modprobe usb:v057Ep030Ad0924dcEFdsc02dp01ic0Eisc01ip00in00
root@raspberrypi:/home/pi# lsmod | grep uvc
uvcvideo               98304  0
videobuf2_vmalloc      16384  2 uvcvideo,bcm2835_v4l2
videobuf2_v4l2         24576  4 uvcvideo,bcm2835_codec,bcm2835_v4l2,v4l2_mem2mem
videobuf2_common       45056  5 uvcvideo,bcm2835_codec,bcm2835_v4l2,v4l2_mem2mem,videobuf2_v4l2
videodev              200704  7 uvcvideo,bcm2835_codec,v4l2_common,videobuf2_common,bcm2835_v4l2,v4l2_mem2mem,videobuf2_v4l2
media                  36864  4 uvcvideo,bcm2835_codec,videodev,v4l2_mem2mem
root@raspberrypi:/home/pi#
  • /lib/modules/4.19.71-v7l/modules.alias 
    [...省略]
alias usb:v*p*d*dc*dsc*dp*ic0Eisc01ip01in* uvcvideo
alias usb:v*p*d*dc*dsc*dp*ic0Eisc01ip00in* uvcvideo
[...省略]
  • drivers/media/usb/uvc/uvcvideo.mod.c 
    [...省略]
MODULE_ALIAS("usb:v1C4Fp3000d*dc*dsc*dp*ic0Eisc01ip00in*");
MODULE_ALIAS("usb:v2833p0201d*dc*dsc*dp*ic0Eisc01ip00in*");
MODULE_ALIAS("usb:v2833p0211d*dc*dsc*dp*icFFisc01ip00in*");
MODULE_ALIAS("usb:v*p*d*dc*dsc*dp*ic0Eisc01ip00in*");
MODULE_ALIAS("usb:v*p*d*dc*dsc*dp*ic0Eisc01ip01in*");

MODULE_INFO(srcversion, "C10A2D5F983795ADBA6DDB5");