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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 --- - [Regression][Bisected] Choppy fullscreen using OpenGL with compositor"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=80349">80349</a>
          </td>
        </tr>

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

        <tr>
          <th>Summary</th>
          <td>[Regression][Bisected] Choppy fullscreen using OpenGL with compositor
          </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>Linux (All)
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>iam@valdikss.org.ru
          </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>unspecified
          </td>
        </tr>

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

        <tr>
          <th>Product</th>
          <td>xorg
          </td>
        </tr></table>
      <p>
        <div>
        <pre>OpenGL in fullscreen is choppy since:

commit 8369166349c92a20d9a2e7d0256e63f66fe2682b
Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Date:   Wed Jun 4 08:29:51 2014 +0100

    sna/dri2: Enable immediate buffer exchanges

    The primary benefit of this is avoid the extra blit when using a
    compositor and instead propagate the compositor flip on the frontbuffer
    to the scanout, or equivalently allows a fullscreen game to flip onto
    the scanout without intervention by TearFree.

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

How to reproduce:
1. Download <a href="http://rghost.ru/56512098">http://rghost.ru/56512098</a>. This is 60 fps video
2. mplayer -vo gl output.mp4 or mpv --vo opengl output.mp4
3. Watch video in windowed mode. It should play very smooth
4. Run mplayer/mpv again. Press "f" to go fullscreen

Expected result:
Video in fullscreen is as smooth as in windowed mode

Actual result:
Video is choppy

Additional information:
I'm running ArchLinux with latest KDE and KWin. It happens only with
compositing on and does not have any correlation with vsync. I'm not using
TearFree driver option.</pre>
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