Comment # 4 on bug 1185970 from Takashi Iwai

That said, if you have a performance problem with the discrete AMDGPU, please
report to the upstream gitlab.freedesktop.org Issues.
The unload of the driver is unsupported, hence the apparent crash you've seen
is more or less expected.

In anyway, better to test 5.13.x kernel at first; it should be available in OBS
Kernel:stable repo.