https://bugzilla.kernel.org/show_bug.cgi?id=199139
--- Comment #16 from Nicholas Kazlauskas (nicholas.kazlauskas@amd.com) --- The logs are sufficient in case to understand what issue you're experiencing.
However, I'm surprised that this is occurring with xf86-video-amdgpu. Another user with a similar setup was reporting this problem only occurring with the modesetting driver - but they were using GNOME instead of xfce.