Comment # 93 on bug 1177428 from Nikolai Nikolaevskii

(In reply to Takashi Iwai from comment #91)
> It's hard to say.  We used to have a workaround (keeping the old firmware
> file) for Vega10 in Leap 15.1 and Leap 15.2, but this was dropped in TW
> (hence also Kernel:HEAD and Kernel:stable) as well as Leap 15.3.
> 
> So, if you have kernel-firmware-all package on your system (not
> kernel-firmware), it means you having the latest firmware from
> TW/Kernel:HEAD, and the workaround in the firmware was gone.  And, IIRC,
> this problem depends on the hardware setup such as the backlight level, so
> the upstream couldn't reproduce the issue.
> 
> If you see the problem with the latest TW kernel and with the latest
> kernel-firmware-amdgpu package, you should report the problem to upstream
> and resolve the bug there at first.

We can get firmware files from amdgpu-pro drivers, package
"RPMS/noarch/amdgpu-dkms-firmware*".
The latest 20.50:
https://www.amd.com/en/support/kb/release-notes/rn-amdgpu-unified-linux-20-50
20.40:
https://www.amd.com/en/support/kb/release-notes/rn-amdgpu-unified-linux-20-40
20.10:
https://www.amd.com/en/support/kb/release-notes/rn-amdgpu-unified-linux-20-10
19.50: https://www.amd.com/en/support/kb/release-notes/rn-amdgpu-unified-linux

Change last numbers to get another version.

What files to use? vega10*.bin or vega12*.bin or vega20*.bin or vegam*.bin?
Ryzen 3200G has Vega 8, Ryzen 3400G has Vega 11 (Radeon��������� RX Vega 11 Graphics).

To OP (Karl Mistelberger): try to use firmware from amdgpu-pro-20.10.