<html>
    <head>
      <base href="https://bugs.freedesktop.org/" />
    </head>
    <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 --- - [HSW] Upgrading from kernel 3.13.x to 3.14.x causes FPS drops during video playback in XBMC"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=75725">75725</a>
          </td>
        </tr>

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

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

        <tr>
          <th>Summary</th>
          <td>[HSW] Upgrading from kernel 3.13.x to 3.14.x causes FPS drops during video playback in XBMC
          </td>
        </tr>

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

        <tr>
          <th>Severity</th>
          <td>critical
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux (All)
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>bugzilla1@gmx.com
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>x86-64 (AMD64)
          </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=95055" name="attach_95055" title="dmesg">attachment 95055</a> <a href="attachment.cgi?id=95055&action=edit" title="dmesg">[details]</a></span>
dmesg

XBMC is an OpenGL application which can use VAAPI to decode videos.

Since upgrading to a kernel of the 3.14.x-family (from 3.14-rc1), I experience
significant FPS drops in video playback.

Reverting back to a kernel of the 3.13.x-family resolves that issue. Watching
videos under 3.14.x is therefore at the moment impossible.

Turning VSync off or on doesn't solve the problem.

Required information:
Chipset: HSW
uname -m: x86_64
uname -r: 3.14.0-031400rc5-generic
Distribution: Ubuntu 13.10
Machine or mobo model: Fujitsu ESPRIMO Q920
Display connector: DisplayPort (conncted to the TV via a HDMI adapter)

Please find attached:
dmesg</pre>
        </div>
      </p>
      <hr>
      <span>You are receiving this mail because:</span>
      
      <ul>
          <li>You are the QA Contact for the bug.</li>
          <li>You are on the CC list for the bug.</li>
          <li>You are the assignee for the bug.</li>
      </ul>
    </body>
</html>