[Bug 94101] New: System hangs for seconds repeatedly and sometimes crashes

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94101

            Bug ID: 94101
           Summary: System hangs for seconds repeatedly and sometimes
                    crashes
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: gegenstand+bugs.freedesktop.org at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 121689
  --> https://bugs.freedesktop.org/attachment.cgi?id=121689&action=edit
GPU crash dump saved to /sys/class/drm/card0/error

On an Intel NUC6i5SY with Fedora 23 (up to date) and monitor attached via DP
the system hangs for 2-10 secs.

Sometimes the system does not recover at all - only reboot helps.

dmesg prints:

[  184.013519] [drm] stuck on render ring
[  184.014589] [drm] GPU HANG: ecode 9:0:0x87f99ff9, in gnome-shell [2466],
reason: Ring hung, action: reset
[  184.014596] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[  184.014600] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[  184.014604] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[  184.014608] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.
[  184.014613] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[  184.016433] drm/i915: Resetting chip after gpu hang
[  186.008063] [drm] RC6 on

(crash dump attached)


Sometimes it only prints:

[ 5747.043340] [drm] stuck on render ring
[ 5747.044505] [drm] GPU HANG: ecode 9:0:0x85df9fff, in gnome-shell [2466],
reason: Ring hung, action: reset
[ 5747.046854] drm/i915: Resetting chip after gpu hang
[ 5749.044000] [drm] RC6 on

Don't know if related but dmesg also sometimes prints:

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