Issue #533 has been reported by frantic from xboot.
---------------------------------------- Bug #533: T440p audio mute button and fan control not working https://ticket.coreboot.org/issues/533
* Author: frantic from xboot * Status: New * Priority: Normal * Target version: master * Start date: 2024-03-07 * Affected versions: master * Affected hardware: Lenovo Thinkpad T440p * Affected OS: All Linux distributions ---------------------------------------- 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.