https://bugzilla.kernel.org/show_bug.cgi?id=204181
--- Comment #18 from Michel Dänzer (michel@daenzer.net) --- (In reply to Yann HN from comment #17)
A friend suggested me to install some packages to enhance the GPU Support, one of them was "xf86-video-amdgpu".
Seams like that package was responsible for the issues. Removing it fixed the issue without any other (notable) effects.
Did you get the same amdgpu_dm_atomic_commit_tail => dc_commit_state => dc_stream_log NULL pointer dereference as reported here?
If yes, this is a kernel driver bug, xf86-video-amdgpu just triggers it / the Xorg modesetting driver avoids it somehow.
If not, please file your own report at https://bugs.freedesktop.org/enter_bug.cgi?product=xorg&component=Driver... and attach the corresponding Xorg log file and output of dmesg.