FS#77137 - [linux] No brightness control since kernel 6.1.4

Attached to Project: Arch Linux
Opened by Kirill Roshchin (Redneko) - Sunday, 15 January 2023, 09:36 GMT
Last edited by Toolybird (Toolybird) - Sunday, 15 January 2023, 20:45 GMT
Task Type Bug Report
Category Kernel
Status Closed
Assigned To No-one
Architecture x86_64
Severity Medium
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 0
Private No

Details

Description:

Since the kernel upgrade from linux-6.1.3.arch1-1 to linux-6.1.4.arch1-1 and up to the current linux-6.1.6.arch1-1, brightness control does not work on my laptop (Honor MagicBook 14 ryzen5-3500u (NBLK-WAX9X M1010)). Also the /sys/class/brightness directory is empty.

At first I noticed that there was no brightness when the brightness indicator disappeared on my waybar and I looked into /sys/class/backlight and this folder became empty. However, other indicators, such as the caps lock indicator are working.

cpu: Ryzen 5 3500U
gpu: ATI Radeon Vega 8 Mobile

To switch the brightness, I use the "light(aur)" program and since the update to 6.1.4, it gives an error that "No backlight controller was found, so we could not decide an automatic target.". And there is no brightness slider in gnome de at all.

Additional info:
* linux-6.1.3.arch1-1 > everything works fine
* linux-6.1.4.arch1-1 > brightness is broken
* linux-6.1.6.arch1-1 > still brocken

Steps to reproduce:
I rolled back to the linux-6.1.3.arch1-1
This task depends upon

Closed by  Toolybird (Toolybird)
Sunday, 15 January 2023, 20:45 GMT
Reason for closing:  Duplicate
Additional comments about closing:   FS#77056 
Comment by loqs (loqs) - Sunday, 15 January 2023, 13:48 GMT
 FS#77056 
Comment by Toolybird (Toolybird) - Sunday, 15 January 2023, 20:45 GMT
Please do not misuse/abuse the Critical Severity level [1]. We entrust you to do the right thing when reporting bugs.

[1] https://wiki.archlinux.org/title/Bug_reporting_guidelines#Severity

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