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    <body><span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span> changed
              <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - [ivb] hang on pageflip"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=74053">bug 74053</a>
        <br>
             <table border="1" cellspacing="0" cellpadding="8">
          <tr>
            <th>What</th>
            <th>Removed</th>
            <th>Added</th>
          </tr>

         <tr>
           <td style="text-align:right;">Summary</td>
           <td>GPU hang on kernel 3.13.0
           </td>
           <td>[ivb] hang on pageflip
           </td>
         </tr></table>
      <p>
        <div>
            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - [ivb] hang on pageflip"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=74053#c1">Comment # 1</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - [ivb] hang on pageflip"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=74053">bug 74053</a>
              from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
        <pre>It appears to have hung trying to execute a pageflip.

0x00007eb0:      0x0a000001: MI_DISPLAY_BUFFER_INFO
0x00007eb4:      0x00001e01:    dword 1
0x00007eb8:      0x06446000:    dword 2
0x00007ebc:      0x00000000: MI_NOOP

which looks consistent with

  fence[14] = 6c3d03b06446001
    valid, x-tiled, pitch: 7680, start: 0x06446000, size: 8355840

and

Pinned [33]:
...
  06446000  8355840 41 00 0 0 P X dirty uncached (name: 49) (fence: 14)

Can you please attach the full dmesg leading to the hang? Does this happen
frequently or was this a one-off event?</pre>
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