Latest Software Updates, now shows fan speed at 42500 RPM

[heynnema]

Has this issue been covered in the Wiki?

• I have read the Wiki and my issue is not covered.

Is there an existing issue reported already?

• I have searched the existing issues, it does not exist.

What is the unexpected behavior?

Dell Inspiron 7700 AIO
Ubuntu 25.10

I just did a Software Update, and I noticed that the fan speed reads 42000 RPM.

Here's the list of what got installed. I suspect libinput as the source of the problem...

2025-12-05 07:20:14 status installed cups-server-common:all 2.4.12-0ubuntu3.5
2025-12-05 07:20:14 status installed timeshift:amd64 25.07.7-0202512041546ubuntu25.04.1
2025-12-05 07:20:14 status installed libwireplumber-0.5-0:amd64 0.5.10-3ubuntu1
2025-12-05 07:20:14 status installed iproute2:amd64 6.16.0-1ubuntu2.1
2025-12-05 07:20:14 status installed cups-common:all 2.4.12-0ubuntu3.5
2025-12-05 07:20:14 status installed libpq5:amd64 17.7-0ubuntu0.25.10.1
2025-12-05 07:20:14 status installed libmysqlclient24:amd64 8.4.7-0ubuntu0.25.10.3
2025-12-05 07:20:14 status installed bluez-obexd:amd64 5.83-1exp1ubuntu0.1
2025-12-05 07:20:14 status installed libinput-bin:amd64 1.28.1-1ubuntu0.1
2025-12-05 07:20:16 status installed bluez:amd64 5.83-1exp1ubuntu0.1
2025-12-05 07:20:16 status installed libunbound8:amd64 1.22.0-2ubuntu2.2
2025-12-05 07:20:16 status installed mysql-server-core:amd64 8.4.7-0ubuntu0.25.10.3
2025-12-05 07:20:16 status installed wireplumber:amd64 0.5.10-3ubuntu1
2025-12-05 07:20:16 status installed mysql-client-core:amd64 8.4.7-0ubuntu0.25.10.3
2025-12-05 07:20:16 status installed libbluetooth3:amd64 5.83-1exp1ubuntu0.1
2025-12-05 07:20:16 status installed libcups2t64:amd64 2.4.12-0ubuntu3.5
2025-12-05 07:20:16 status installed cups-ipp-utils:amd64 2.4.12-0ubuntu3.5
2025-12-05 07:20:16 status installed libinput10:amd64 1.28.1-1ubuntu0.1
2025-12-05 07:20:16 status installed cups-ppdc:amd64 2.4.12-0ubuntu3.5
2025-12-05 07:20:16 status installed mysql-client:amd64 8.4.7-0ubuntu0.25.10.3
2025-12-05 07:20:16 status installed cups-client:amd64 2.4.12-0ubuntu3.5
2025-12-05 07:20:16 status installed libcupsimage2t64:amd64 2.4.12-0ubuntu3.5
2025-12-05 07:20:17 status installed cups-daemon:amd64 2.4.12-0ubuntu3.5
2025-12-05 07:20:22 status installed mysql-server:amd64 8.4.7-0ubuntu0.25.10.3
2025-12-05 07:20:23 status installed cups-core-drivers:amd64 2.4.12-0ubuntu3.5
2025-12-05 07:20:27 status installed cups:amd64 2.4.12-0ubuntu3.5
2025-12-05 07:20:27 status installed cups-bsd:amd64 2.4.12-0ubuntu3.5
2025-12-05 07:20:27 status installed bluez-cups:amd64 5.83-1exp1ubuntu0.1
2025-12-05 07:20:28 status installed mailcap:all 3.74ubuntu1
2025-12-05 07:20:28 status installed desktop-file-utils:amd64 0.28-1
2025-12-05 07:20:28 status installed hicolor-icon-theme:all 0.18-2
2025-12-05 07:20:28 status installed gnome-menus:amd64 3.36.0-3ubuntu2
2025-12-05 07:20:28 status installed libc-bin:amd64 2.42-0ubuntu3
2025-12-05 07:20:28 status installed ufw:all 0.36.2-9
2025-12-05 07:20:31 status installed man-db:amd64 2.13.1-1
2025-12-05 07:20:31 status installed gnome-shell-common:all 49.0-1ubuntu1.1
2025-12-05 07:20:31 status installed libglib2.0-0t64:amd64 2.86.0-2
2025-12-05 07:20:31 status installed dbus:amd64 1.16.2-2ubuntu2
2025-12-05 07:20:31 status installed gnome-shell:amd64 49.0-1ubuntu1.1

Steps to reproduce the unexpected behavior.

Start Vitals
Note incorrect fan speed

Relevant log output

What distribution and version of Linux are you using?

Ubuntu 25.10

What version of Gnome are you using?

49

[corecoding]

My guess is that your kernel was updated and it is reporting incorrect numbers. You can look for the files that Vitals uses by looking for files in /sys/class/hwmon/ with name matching "fan*_input". If you cat these files one by one, and see 42500 rpm, then the issue is not related to Vitals

[heynnema]

A reboot solved the problem. Fan speed now shows ~1400 RPM. Thanks for your help.