Alex Deucher <alexdeucher@xxxxxxxxx> wrote: > 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
