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      <base href="https://bugs.freedesktop.org/" />
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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 --- - Page rendering corruption in Firefox [SNA]"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=67015">67015</a>
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>chris@chris-wilson.co.uk
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Page rendering corruption in Firefox [SNA]
          </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>linuxhippy@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>git
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Driver/intel
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>xorg
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=82566" name="attach_82566" title="screenshot">attachment 82566</a> <a href="attachment.cgi?id=82566&action=edit" title="screenshot">[details]</a></span>
screenshot

When viewing the page <a href="https://bugs.kde.org/show_bug.cgi?id=224447">https://bugs.kde.org/show_bug.cgi?id=224447</a> on my SNB
laptop with the official FF-22 build I get page corruptions when another window
is on top of Firefox.

Steps to reproduce:
1. Load <a href="https://bugs.kde.org/show_bug.cgi?id=224447">https://bugs.kde.org/show_bug.cgi?id=224447</a> in Firefox
2. Scroll to bottom
3. Move/Open window on top of the FF window

Quite often the page is already corrupted after scrolling to the bottom.

I did some bisecting, however I am not really convinced its really the commit
to blame: 

48028a7c923fa0d66b01e8e94d4f0742866f78ec is the first bad commit
commit 48028a7c923fa0d66b01e8e94d4f0742866f78ec
Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Date:   Fri Jun 21 14:29:43 2013 +0100

    sna: Inspect availablity of render before prefering to use the GPU

    Signed-off-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>

:040000 040000 f56e8b2d4e7c6fdd77080ac66437e56fa6cd3938
a3ba69294e46d078d94dd5f6ad976ec6eaccbfb2 M    src</pre>
        </div>
      </p>
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