On Mon, Dec 23, 2024 at 4:08 AM Siva Mahadevan <me@xxxxxxxxxxxx> wrote: > > #regzbot introduced: 99a02eab8 > > Observed behaviour: > linux-stable v6.12.5 has a regression on my thinkpad e495 where > suspend/resume of the laptop results in my backlight brightness settings > to be reset to some very high value. After resume, I'm able to increase > brightness further until max brightness, but I'm not able to decrease it > anymore. > > Behaviour prior to regression: > linux-stable v6.12.4 correctly maintains the same brightness setting on > the backlight that was set prior to suspend/resume. > > Notes: > I bisected this issue between v6.12.4 and v6.12.5 to commit 99a02eab8 > titled "drm/amdgpu: rework resume handling for display (v2)". Odd. That commit shouldn't affect the backlight per se. > > Hardware: > * lenovo thinkpad e495 > * AMD Ryzen 5 3500U with Radeon Vega Mobile Gfx > * VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] > Picasso/Raven 2 [Radeon Vega Series / Radeon Vega Mobile Series] > (rev c2) Please file a ticket here: https://gitlab.freedesktop.org/drm/amd/-/issues and attach your full dmesg output and we'll take a look. Thanks, Alex
