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<base href="https://bugs.freedesktop.org/" />
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<th>Priority</th>
<td>medium
</td>
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<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - HDMI audio on ati7750 choppy with ALSA multi-channel apps"
href="https://bugs.freedesktop.org/show_bug.cgi?id=77677">77677</a>
</td>
</tr>
<tr>
<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>HDMI audio on ati7750 choppy with ALSA multi-channel apps
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Reporter</th>
<td>socalfisher@gmail.com
</td>
</tr>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Radeon
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr></table>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=97618" name="attach_97618" title="Alsa No Pulseaudio xorg.0.log dmesg aplayL/l codec logs">attachment 97618</a> <a href="attachment.cgi?id=97618&action=edit" title="Alsa No Pulseaudio xorg.0.log dmesg aplayL/l codec logs">[details]</a></span>
Alsa No Pulseaudio xorg.0.log dmesg aplayL/l codec logs
I am having issues playing sounds over HDMI stereo directly to TV. I am using
XBMC.
When Pulse Audio is installed the sounds play fine in stereo. When I try a
pure alsa installation (no pulse audio) there is severe distortion. Pure ALSA
is needed for applications that only support ALSA, and for HDMI pass-through.
My dedicated Radeon 7750 card only outputs cyclical sounds, quiet voices like
wrong channel, and echos. Setup PC to TV directly HDMI (2.0 audio selected). I
have had the same issue when cpu was an AMD 955BE, and now Intel i7 4770.
Windows 7 plays hdmi audio just fine on the same exact PC/Panasonic
plasma/setup.
1) speaker-test -l 4 -c 2 -r 48000 -D hw:1,3 plays choppy sounds with or
without pulse installed.
2) aplay -D plughw:1,3 /usr/share/sounds/alsa/Front_Center.wav plays fine
Using an A4-3400 HDMI plays perfectly fine on the same TV. As does my Zotac
AQ01.
Not sure if this is related (<a href="http://ubuntuforums.org/showthread.php?t=2207698">http://ubuntuforums.org/showthread.php?t=2207698</a>):
SND_PCM_ACCESS_RW_INTERLEAVED vs. SND_PCM_ACCESS_MMAP_INTERLEAVED
I believe XBMC uses SND_PCM_ACCESS_RW_INTERLEAVED for ALSA.
Thanks in advance.</pre>
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