BUG: No GUI display on 60 Hz monitors #12
Description
-- System Information: CUH-1216 Belize B0(0x20200)
-- Firmware: 9.00
-- Exploit: PSFree + Lapse -> Goldhen -> Ps3itaTeam Linux Loader
-- OS: Arch Linux
-- Desktop Environment: xfce4
-- Display Manager: lightdm
-- Affected branch: ps4-linux-6.15.y
Currently due to the 1080p - 120 Hz commit, after loading into a display manager from the kernel / initramfs stage, it leads to a grey or blackscreen on my 60Hz Samsung monitor.
An HDMI unplug+replug is not enough to fix the problem, as the display then outputs:
Not Optimum Mode
Recommended Mode 1920x1080 60Hz
Output on a TTY works however, and the other fix option is to have a xorg.conf file in /usr/share/X11/xorg.conf.d/ with an appropriate monitor section specifying the refresh rate and other display configurations.
Reverting the aforementioned commit fixes the issue:
feeRnt@ed87e39
A potential fix is to have a "DRM_MODE_TYPE_PREFERRED" flag type in the 1080p mode, which might be chosen by the display manager at runtime..
Higher or non-standard modes then maybe selected from userspace using xrandr or other means.
--- a/drivers/gpu/drm/amd/amdgpu/ps4_bridge.c
+++ b/drivers/gpu/drm/amd/amdgpu/ps4_bridge.c
@@ -688,7 +688,7 @@
};
/* 16 - 1920x1080@60Hz */
static const struct drm_display_mode mode_1080p = {
- DRM_MODE("1920x1080", DRM_MODE_TYPE_DRIVER, 148500, 1920, 2008,
+ DRM_MODE("1920x1080", DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, 148500, 1920, 2008,
2052, 2200, 0, 1080, 1084, 1089, 1125, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC),
.picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9
But I have not tested this yet.