Comment 3 for bug 1838181

Possibly related from the kernel log:

[ 373.840537] [drm] GPU HANG: ecode 9:0:0x85dffffb, in zinc [4585], reason: hang on rcs0, action: reset
[ 373.840584] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
[ 383.837062] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
[ 393.821041] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
[ 404.956876] asynchronous wait on fence i915:zinc[4585]/1:11 timed out
[ 405.821085] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
[ 415.964886] asynchronous wait on fence i915:zinc[4585]/1:14 timed out
[ 419.837025] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
[ 426.972786] asynchronous wait on fence i915:zinc[4585]/1:17 timed out
[ 431.841000] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
[ 431.854654] show_signal_msg: 29 callbacks suppressed
[ 431.854660] zinc[4585]: segfault at 20 ip 000056484167bd9e sp 00007fffb80cd2f0 error 4 in zinc[56484159e000+290000]
[ 431.854672] Code: 48 89 55 e8 48 8b 55 f0 48 8b 45 f8 48 89 d6 48 89 c7 e8 1c 0c 00 00 90 c9 c3 55 48 89 e5 48 89 7d f8 48 89 75 f0 48 8b 45 f0 <48> 8b 10 48 8b 45 f8 48 89 10 90 5d c3 90 55 48 89 e5 48 89 7d f8
[ 744.794676] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
[ 756.798602] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
[ 766.778545] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
[ 782.778425] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
[ 793.822394] asynchronous wait on fence i915:memcheck-amd64-[4688]/1:14 timed out
[ 796.794414] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
[ 806.778371] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0