[Bug 91601] New: System hangs for ~20 seconds, text becomes garbled

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91601

            Bug ID: 91601
           Summary: System hangs for ~20 seconds, text becomes garbled
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: glennpowers at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 117622
  --> https://bugs.freedesktop.org/attachment.cgi?id=117622&action=edit
/sys/class/drm/card0/error

[77438.410133] [drm] stuck on render ring
[77438.410139] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[77438.410140] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[77438.410141] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[77438.410142] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[77438.410143] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.

This happened shortly after watching a youtube video in firefox.

Pithos is running in VMware Unity mode w/Lubuntu 14.04.3 (updates installed).

This has happened infrequently in the past (a couple of times a month). Now,
it's (about) every other day.

Hardware is System 76 Gazelle p8 / Ubuntu 14.04.3. All updates installed.

Linux kali 3.13.0-61-generic #100-Ubuntu SMP Wed Jul 29 11:21:34 UTC 2015
x86_64 x86_64 x86_64 GNU/Linux

/sys/class/drm/card0/error attached.

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