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

        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - Scrolling broken with window on top [SNA] in 2.21.12"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=66991">66991</a>
          </td>
        </tr>

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

        <tr>
          <th>Summary</th>
          <td>Scrolling broken with window on top [SNA] in 2.21.12
          </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=82536" name="attach_82536" title="screenshot">attachment 82536</a> <a href="attachment.cgi?id=82536&action=edit" title="screenshot">[details]</a></span>
screenshot

On my SNB laptop (running xfce with no composition manager), when scrolling
within an application which has a window on top, the background application
isn't re-painted with 2.21.12.
Instead, the content of the top-level window is "scrolled".

Please find a screenshot of the issue attached.

Side note: Current git ( 3f3071c6c91c3907cb0fecf2f69a995feefe7956 ) is
completely broken on my system. Scrolling doesn't seem to honor clipping and I
get frequent crashes.</pre>
        </div>
      </p>
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