https://bugs.freedesktop.org/show_bug.cgi?id=111122
--- Comment #4 from Chí-Thanh Christopher Nguyễn chithanh@gentoo.org --- Same symptoms here after upgrading from Linux 5.1 to 5.2 on Dell Latitude 5495, Ryzen Pro 2700U. Graphical corruption, and/or the GUI will stop responding. Magic SysRq is needed to reboot the computer.
kernel log contains the following bits when this happens:
[ 44.921571] [drm:amdgpu_job_timedout] *ERROR* ring gfx timeout, signaled seq=1112, emitted seq=1115 [ 44.921574] [drm:amdgpu_job_timedout] *ERROR* Process information: process X pid 4477 thread X:cs0 pid 4587 [ 44.921575] [drm] GPU recovery disabled.