<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 --- - [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>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the QA Contact for the bug.</li>
</ul>
</body>
</html>