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<base href="https://bugs.freedesktop.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - VDPAU Playback Slow with CRTC @ 24 hz"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89919">89919</a>
</td>
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<th>Summary</th>
<td>VDPAU Playback Slow with CRTC @ 24 hz
</td>
</tr>
<tr>
<th>Product</th>
<td>xorg
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
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<th>OS</th>
<td>Linux (All)
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>Driver/Radeon
</td>
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<th>Assignee</th>
<td>xorg-driver-ati@lists.x.org
</td>
</tr>
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<th>Reporter</th>
<td>adamvleggett@gmail.com
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>xorg-team@lists.x.org
</td>
</tr></table>
<p>
<div>
<pre>My GPU is Mullins, integrated with the GX-412HC system-on-chip.
I am running Ubuntu 14.10 with xserver-xorg-video-radeon_7.5.0-1.
Video playback through a competent player like mpv is generally smooth even
when using the default performance profile, with the default 60hz display mode
selected. However, if I use xrandr:
xrandr --output HDMI-0 --mode 1920x1080 --rate 24
Suddenly playback becomes quite jerky, and is not helped much by raising the
card to the highest performance profile. This is true of VLC, mpv, and
mplayer2, so I do not think it is player related. This is also true of any
video file.
I have tested this with a variety of radeon DRI and xserver-xorg-video-radeon
versions. In those versions that support Mullins, I have not seen any
differences.
Using a 24hz mode is very desirable when playing back a feature film that was
shot at 24 fps.</pre>
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</p>
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