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From: serg.partizan@gmail.com
To: stable@vger.kernel.org
Cc: regressions@lists.linux.dev, mario.limonciello@amd.com,
	hamza.mahfooz@amd.com, alexander.deucher@amd.com
Subject: [REGRESSION] Brightness at max level after waking up from sleep on AMD Laptop
Date: Sat, 27 Jul 2024 19:52:19 +0300	[thread overview]
Message-ID: <77KAHS.13UUH2XVHQQF1@gmail.com> (raw)

Hello,

After updating from 6.8.9 to 6.9.1 I noticed a bug on my HP Envy x360 
with AMD Ryzen 5 4500U.

#regzbot introduced: v6.8.9..v6.9.1

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

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



                 reply	other threads:[~2024-07-27 16:52 UTC|newest]

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