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      <base href="https://bugs.freedesktop.org/" />
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - [IVB GT1] GPU hang"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=78751">78751</a>
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>bb@knacknuss.de
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>kenneth@whitecape.org
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[IVB GT1] GPU hang
          </td>
        </tr>

        <tr>
          <th>QA Contact</th>
          <td>intel-3d-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux (All)
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>kenneth@whitecape.org
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Other
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>git
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Drivers/DRI/i965
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>Mesa
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=99110" name="attach_99110" title="cat /sys/class/drm/card0/error > error.txt">attachment 99110</a> <a href="attachment.cgi?id=99110&action=edit" title="cat /sys/class/drm/card0/error > error.txt">[details]</a></span>
cat /sys/class/drm/card0/error > error.txt

+++ Split separate issue out of <a class="bz_bug_link 
          bz_status_REOPENED "
   title="REOPENED --- - [ivb/hsw] batch overwritten with garbage"
   href="show_bug.cgi?id=77207">Bug #77207</a>.  Actual reporter is Benjamin
Baumgärtner <<a href="mailto:bb@knacknuss.de">bb@knacknuss.de</a>> +++

I upgraded my Ubuntu trusty to today's state of the xorg-edgers PPA:

xserver-xorg-core    2:1.15.1-0ubuntu2
xserver-xorg-video-intel   
2:2.99.911+git20140507.18416b51-0ubuntu0ricotz~trusty
libegl1-mesa:amd64    10.3.0~git20140514.8a9f5ecd-0ubuntu0sarvatt~trusty
libgl1-mesa-dri:amd64    10.3.0~git20140514.8a9f5ecd-0ubuntu0sarvatt~trusty

$ glxinfo | grep Mesa
client glx vendor string: Mesa Project and SGI
OpenGL renderer string: Mesa DRI Intel(R) Ivybridge Desktop 
OpenGL core profile version string: 3.3 (Core Profile) Mesa 10.3.0-devel
OpenGL version string: 3.0 Mesa 10.3.0-devel

I'm still experiencing problems. Garbage screen output disappeared, but the
screen is stuck for 5-20 secs every 1-3 minutes.

The kernel ring buffer says:
[  333.738942] [drm] stuck on render ring
[  333.738951] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[  333.738952] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[  333.738953] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[  333.738954] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[  333.738955] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.
[  339.736311] [drm] stuck on render ring
[  339.736354] [drm:i915_context_is_banned] *ERROR* context hanging too fast,
declaring banned!
[  348.720483] [drm] stuck on render ring
[  354.729941] [drm] stuck on render ring
[  360.727429] [drm] stuck on render ring
[  360.727558] [drm:i915_context_is_banned] *ERROR* context hanging too fast,
declaring banned!
[  439.102608] init: tty1 main process ended, respawning
[  468.674648] [drm] stuck on render ring
[  647.707294] [drm] stuck on render ring
[  716.739191] [drm] stuck on render ring

So I'm still having trouble, even with xserver 1.15.1 and a recent mesa
version.

Regards,
Benjamin</pre>
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