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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 --- - DRM GPU Hang - dmesg crash report"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=74180">74180</a>
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>DRM GPU Hang - dmesg crash report
          </td>
        </tr>

        <tr>
          <th>QA Contact</th>
          <td>intel-gfx-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>neembi@gmail.com
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>x86-64 (AMD64)
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>XOrg CVS
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>DRM/Intel
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>DRI
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=92994" name="attach_92994" title="cat /sys/class/drm/card0/error > bug_report.dat">attachment 92994</a> <a href="attachment.cgi?id=92994&action=edit" title="cat /sys/class/drm/card0/error > bug_report.dat">[details]</a></span>
cat /sys/class/drm/card0/error > bug_report.dat

So I:

  1. Went to www.buildwithchrome.com and fooled around for a minute.
  2. Then everything hung.

Found this in dmesg after killing Chrome.

  * WebGL is enabled in Chrome, I'm guessing this has something to do with it.
  * I'm using UXA because SNA was too unstable in Google Maps, would always
hang.

Versions:

  Arch Linux 3.13.0-1-mainline #1 SMP PREEMPT Mon Jan 20 12:44:30 CET 2014
x86_64 GNU/Linux

  xorg-server 1.15.0-5
  xf86-video-intel 2.99.907-2

Well, here you go anyway:

[ 3448.838407] [drm] stuck on render ring
[ 3448.838410] [drm] stuck on blitter ring
[ 3448.838412] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[ 3448.838413] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[ 3448.838414] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[ 3448.838414] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[ 3448.838415] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.

Hope this helps you.

–Ben</pre>
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