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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 - GPU HANG: ecode 7:0: stuck on render ring, gdm won't start X"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=93960">93960</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>GPU HANG: ecode 7:0: stuck on render ring, gdm won't start X
          </td>
        </tr>

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

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

        <tr>
          <th>Hardware</th>
          <td>x86-64 (AMD64)
          </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>douglas.bagnall@catalyst.net.nz
          </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=121451" name="attach_121451" title="/sys/class/drm/card0/error">attachment 121451</a> <a href="attachment.cgi?id=121451&action=edit" title="/sys/class/drm/card0/error">[details]</a></span>
/sys/class/drm/card0/error

This is Ubuntu 15.10 with xserver-xorg-video-intel
2:2.99.917+git20150808-0ubuntu4, kernel 4.2.0-25-generic.
The GPU calls itself "Xeon E3-1200 v3/4th Gen Core Processor Integrated
Graphics Controller".

dmesg:

[  103.762219] [drm] stuck on render ring
[  103.764101] [drm] GPU HANG: ecode 7:0:0x87df7c12, in Xorg [1199], reason:
Ring hung, action: reset
[  103.764103] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[  103.764103] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[  103.764104] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[  103.764104] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.
[  103.764105] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[  103.766155] drm/i915: Resetting chip after gpu hang

gdm and xdm can't start X but lightdm can.</pre>
        </div>
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