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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 --- - GPU Hangs"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=58212">58212</a>
          </td>
        </tr>

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

        <tr>
          <th>Summary</th>
          <td>GPU Hangs
          </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>All
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>brian.m.hill@gmail.com
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Other
          </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=71410" name="attach_71410" title="Xorg Log">attachment 71410</a> <a href="attachment.cgi?id=71410&action=edit" title="Xorg Log">[details]</a></span>
Xorg Log

I am having an issue wherein the GPU will hand during normal use of my
computer.

Arch Linux x86-64
Kernel 3.6.9
KDE 4.9.4

At random points when using the computer, the GPU driver will hang and
everything will revert to software rendering, causing everything to run
unusably slow until Xorg is restarted. It sometimes happens multiple times a
day and sometimes only happens once every few days. This latest time it
happened, I was using Firefox. 

dmesg returns the following :
[290082.779837] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed...
GPU hung
[290082.779844] [drm] capturing error event; look for more information in
/debug/dri/0/i915_error_state</pre>
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