https://bugs.freedesktop.org/show_bug.cgi?id=104295
--- Comment #5 from Emil Velikov emil.l.velikov@gmail.com --- (In reply to sleepyoh from comment #4)
Running Arch, Had the same problem but is since today solved.
Today there was updates from mesa (17.3.0-2 -> 17.3.1-2) and xorg-server (1.19.5-1 -> 1.19.6-2) wich solved this problem, working fine again.
https://bbs.archlinux.org/viewtopic.php?id=232925
I had problems for weeks, now working fine, resolved for me.
I fear your observation is unrelated - Mesa 17.3.1 includes commit 5ac9d91ee3d897016d54e970a977c3fbbbe2488e, which a) is exclusive for Intel (Skylake or newer) b) resolved a GPU lockup
While the issue here seems to be: a) radeonsi hardware b) program crash