* [REGRESSION] incorrect backlight brightness on AMD in 7.1.6
@ 2026-08-09 16:23 Sergio Callegari
2026-08-11 6:35 ` Thorsten Leemhuis
0 siblings, 1 reply; 2+ messages in thread
From: Sergio Callegari @ 2026-08-09 16:23 UTC (permalink / raw)
To: stable
Hi,
Control of backlight brightness regressed with 7.1.6, possibly due to
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1191285ecb4233e5bf907da7e9394d7999055566
that may be incorrect.
On this kernel when you try to rise the brightness, it does so up to
~95% then it suddenly falls to the minimum brightness. Conversely 0%
gives you one step above the minimum brightness.
A possibly related discussion is at
https://discuss.cachyos.org/t/brightness-lower-at-100-than-98-on-plasma-asus-g14/33957
Best regards,
Sergio
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [REGRESSION] incorrect backlight brightness on AMD in 7.1.6
2026-08-09 16:23 [REGRESSION] incorrect backlight brightness on AMD in 7.1.6 Sergio Callegari
@ 2026-08-11 6:35 ` Thorsten Leemhuis
0 siblings, 0 replies; 2+ messages in thread
From: Thorsten Leemhuis @ 2026-08-11 6:35 UTC (permalink / raw)
To: Sergio Callegari, stable
On 8/9/26 18:23, Sergio Callegari wrote:
> Control of backlight brightness regressed with 7.1.6, possibly due to
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/
> commit/?id=1191285ecb4233e5bf907da7e9394d7999055566 that may be incorrect.
>
> On this kernel when you try to rise the brightness, it does so up to
> ~95% then it suddenly falls to the minimum brightness. Conversely 0%
> gives you one step above the minimum brightness.
FWIW, the upstream report is here:
https://gitlab.freedesktop.org/drm/amd/-/work_items/5562
A stable specifc revert is discussed here:
https://lore.kernel.org/all/9c6acb62-4080-48e6-9ba2-d1c457c4ec88@gmail.com/
Ciao, Throsten
^ permalink raw reply [flat|nested] 2+ messages in thread
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