[Bug 90659] New: [drm] stuck on render ring, screen hangs up to 10 seconds or so

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90659

            Bug ID: 90659
           Summary: [drm] stuck on render ring, screen hangs up to 10
                    seconds or so
           Product: DRI
           Version: unspecified
          Hardware: x86 (IA32)
                OS: Linux (All)
            Status: NEW
          Severity: minor
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: dvereb at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 116043
  --> https://bugs.freedesktop.org/attachment.cgi?id=116043&action=edit
crash dump "/sys/class/drm/card0/error", as requested by syslog

kernel: [ 2708.288888] [drm] stuck on render ring
kernel: [ 2708.288895] [drm] GPU crash dump saved to /sys/class/drm/card0/error
kernel: [ 2708.288896] [drm] GPU hangs can indicate a bug anywhere in the
entire gfx stack, including userspace.
kernel: [ 2708.288897] [drm] Please file a _new_ bug report on
bugs.freedesktop.org against DRI -> DRM/Intel
kernel: [ 2708.288898] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
kernel: [ 2708.288899] [drm] The gpu crash dump is required to analyze gpu
hangs, so please always attach it.


I'm running Ubuntu 12.04.5 32-bit on a 64-bit capable processor, so I selected
x86 - sorry if I'm in the wrong spot.  One to three times per week at work (40
hours/week) everything except the mouse cursor becomes unresponsive for about
five to ten seconds.  All I can do is move the cursor around until the screen
catches up.  All of my applications appear to run fine during this - I just
can't see them update as I'm stuck looking at whatever happened to be on my
screen at the time it hangs.  This has happened on at least seven different
machines with the same hardware.  It'll happen again if you'd like me to test
something, but I honestly have no idea how to reproduce this bug.  The only
thing I can think of is our application that uses fox toolkit and OpenGL.  I'll
try to see if it happens outside of the application, but up until now I haven't
noticed one way or the other.

The only issue I've noticed after the freeze is the occasional character that
won't display.  For example, all of a sudden it won't display the letter 'U' in
the terminal I had open, but I can copy and paste the text out or open up a new
terminal and it'll work fine.

If there's anything else I should include, please let me know.  I'm not
normally one to submit bugs, so I'm not up on the whole process as of yet.  I
wish I could reproduce it intentionally, but I figured I'd post it due to how
often it happens.

Thanks!

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