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Bug #533

closed

T440p audio mute button and fan control not working

Added by frantic from xboot 7 months ago. Updated 6 months ago.

Status:
Resolved
Priority:
Normal
Assignee:
-
Category:
-
Target version:
Start date:
03/07/2024
Due date:
% Done:

0%

Estimated time:
Affected versions:
Needs backport to:
Affected hardware:
Lenovo Thinkpad T440p
Affected OS:
All Linux distributions

Description

In recent coreboot versions, the audio mute button and fan control has stopped working. Whereas you use the same revision from Libreboot, it all works fine and smoothly. This leads me to suspect that someone changed someone without testing, which is real annoying.
The audio mute button technically still functions, but the LED no longer turns on/off. Always just off.
Fan control no longer works with Thinkfan. /proc/acpi/ibm/fan doesn't exist any more. I've tried "force loading" thinkpad_acpi, but it doesn't work.

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