[Bug 203905] amdgpu:actual_brightness has unreal/wrong value

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=203905

--- Comment #28 from Antony J.R (antonyjr000 at gmail.com) ---
(In reply to Paulo Nascimento from comment #26)
> laptop: Lenovo Legion 5, amd ryzen 5 4600h
> Graphics:  Device-1: NVIDIA TU116M [GeForce GTX 1660 Ti Mobile] driver:
> nouveau
>            Device-2: Advanced Micro Devices [AMD/ATI] Renoir driver: amdgpu
> Kernel 5.11.6-1
> Manjaro 21.1
> 
> I have tried all suggested workarounds:
> - systemctl start systemd-backlight at backlight:amdgpu_bl0
> 
> - mkinitcpio with MODULES=(amdgpu)
> 
> - acpi_backlight=vendor
> 
> - acpi_backlight=video
> 
> - /usr/lib/systemd/systemd-backlight save backlight:amdgpu_bl0
>   /usr/lib/systemd/systemd-backlight load backlight:amdgpu_bl0
> 
> Even echo 10 >/sys/class/backlight/amdgpu_bl0/brightness doesn't change the
> brightness.
> 
> Any suggestions?

Please read the entire thread here ->
https://bugzilla.opensuse.org/show_bug.cgi?id=1180749

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