https://bugzilla.kernel.org/show_bug.cgi?id=204181
--- Comment #13 from Sergey Kondakov (virtuousfox@gmail.com) --- Created attachment 283745 --> https://bugzilla.kernel.org/attachment.cgi?id=283745&action=edit tail -n 2000 from dmesg with "drm.debug=5"
drm.debug=4 seem to produce only 1 new relevant line: "[drm:dc_commit_state [amdgpu]] dc_commit_state: 2 streams" so I tried increasing it. debug=5 creates a horrible stream that bogs down system with i/o load from journald but it sure did write some more at the moment of hang. I'm not going any further than that, though.