On 7/31/24 02:38, Linux regression tracking (Thorsten Leemhuis) wrote:
[+amd-glx, +lkml, +dri-devel]
On 27.07.24 18:52, serg.partizan@xxxxxxxxx wrote:
After updating from 6.8.9 to 6.9.1 I noticed a bug on my HP Envy x360
with AMD Ryzen 5 4500U.
[...]
After waking up from sleep brightness is set to max level, ignoring
previous value.
With the help of Arch Linux team, we was able to track bad commit to
this:
https://gitlab.freedesktop.org/agd5f/linux/-/commit/63d0b87213a0ba241b3fcfba3fe7b0aed0cd1cc5
Hamza Mahfooz, in case you missed it, that is a patch of yours:
63d0b87213a0ba ("drm/amd/display: add panel_power_savings sysfs entry to
eDP connectors") [v6.9-rc1].
Um, for the time being you should be able to set `amdgpu.abmlevel=0` in
the kernel's cmdline to avoid the issue.
I have tested this on latest mainline kernel:
Results after waking up:
cat /sys/class/backlight/amdgpu_bl1/{brightness,actual_brightness}
12
252
Then, on exact this commit (63d0b87213a0ba241b3fcfba3fe7b0aed0cd1cc5),
result is the same.
Then, on commit just before this one (aeaf3e6cf842):
cat /sys/class/backlight/amdgpu_bl1/{brightness,actual_brightness}
12
12
I hope I included all relevant information, more info can be found here:
https://gitlab.archlinux.org/archlinux/packaging/packages/linux/-/issues/52
Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
--
Everything you wanna know about Linux kernel regression tracking:
https://linux-regtracking.leemhuis.info/about/#tldr
If I did something stupid, please tell me, as explained on that page.
P.S.:
#regzbot introduced: 63d0b87213a0ba241
--
Hamza
