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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Total video freeze for minute"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=92647">92647</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Total video freeze for minute
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>DRI
          </td>
        </tr>

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

        <tr>
          <th>Hardware</th>
          <td>x86 (IA32)
          </td>
        </tr>

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

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

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

        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

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

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

        <tr>
          <th>Reporter</th>
          <td>jim@pa1jim.nl
          </td>
        </tr>

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

        <tr>
          <th>CC</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=119150" name="attach_119150" title="/sys/class/drm/card0/error dump">attachment 119150</a> <a href="attachment.cgi?id=119150&action=edit" title="/sys/class/drm/card0/error dump">[details]</a></span>
/sys/class/drm/card0/error dump

Once every other hour or so, whole system freezes for roughly a minute. Resumes
perfect after that. Found this in syslog: 

Oct 23 18:45:40 PA1JIM kernel: [  551.137844] [drm] stuck on render ring
Oct 23 18:45:40 PA1JIM kernel: [  551.137852] [drm] GPU crash dump saved to
/sys/class/drm/card0/error
Oct 23 18:45:40 PA1JIM kernel: [  551.137853] [drm] GPU hangs can indicate a
bug anywhere in the entire gfx stack, including userspace.
Oct 23 18:45:40 PA1JIM kernel: [  551.137854] [drm] Please file a _new_ bug
report on bugs.freedesktop.org against DRI -> DRM/Intel
Oct 23 18:45:40 PA1JIM kernel: [  551.137854] [drm] drm/i915 developers can
then reassign to the right component if it's not a kernel issue.
Oct 23 18:45:40 PA1JIM kernel: [  551.137855] [drm] The gpu crash dump is
required to analyze gpu hangs, so please always attach it.

Linux PA1JIM 3.13.0-66-generic #108-Ubuntu SMP Wed Oct 7 15:20:27 UTC 2015
x86_64 x86_64 x86_64 GNU/Linux</pre>
        </div>
      </p>
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