[Intel-gfx] GPU hangs and X shot down with 4.11-rc6

[Michal Hocko]

Hi,
I have just experienced X being shut down once with 4.11-rc2 and 2 times
with 4.11-rc6 kernel.  I do not remember seeing something like this
before but it is quite possible I was just lucky to not trigger this
issue before. It always happened while I was working on a presentation
in LibreOffice which I do very seldom. The kernel log contains:

[ 7456.721893] [drm] GPU HANG: ecode 9:0:0x86dffffd, in Xorg [3594], reason: Hang on render ring, action: reset
[ 7456.721897] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
[ 7456.721898] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
[ 7456.721900] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
[ 7456.721901] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.
[ 7456.721902] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[ 7456.721925] drm/i915: Resetting chip after gpu hang
[ 7456.722117] [drm] RC6 on
[ 7456.734588] [drm] GuC firmware load skipped
[ 7464.686209] drm/i915: Resetting chip after gpu hang
[ 7464.686284] [drm] RC6 on
[ 7464.702469] [drm] GuC firmware load skipped
[ 7472.686180] drm/i915: Resetting chip after gpu hang
[ 7472.686241] [drm] RC6 on
[ 7472.704565] [drm] GuC firmware load skipped
[ 7480.686179] drm/i915: Resetting chip after gpu hang
[ 7480.686241] [drm] RC6 on
[ 7480.704583] [drm] GuC firmware load skipped
[ 7493.678130] drm/i915: Resetting chip after gpu hang
[ 7493.678206] [drm] RC6 on
[ 7493.696505] [drm] GuC firmware load skipped

The kernel message tells that the problem might be anywhere and I should
report to freedesktop but I haven't changed the userspace recently so it
smells more like a kernel bug to me. Does this ring bells? The GPU crash
dump is attached in case it is useful.

Let me know if you need additional information.

Thanks!
-- 
Michal Hocko
SUSE Labs
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