[Bug 388081] Re: audio skips, pulseaudio -vvv shows underrun in module-alsa-sink.c

[Robert Hrovat]

It is still a big issue! One of my machines, that never had audio
problems with previous Ubuntu versions, renders audio playback unusable
with Lucid. It doesn't matter what program do I use and I doesn't matter
whether it's audio, video or flash playback. It keeps skipping.

Today I started PA with debug and when it started skipping audio, PA
gave output:

D: alsa-sink.c: Wakeup from ALSA!
I: alsa-sink.c: Underrun!
I: alsa-sink.c: Increasing wakeup watermark to 50,00 ms
D: protocol-native.c: Underrun on ''The Racing Rats' by 'Editors'', 0 bytes in queue.
D: protocol-native.c: Requesting rewind due to rewrite.
D: alsa-sink.c: Requested to rewind 39124 bytes.
D: alsa-sink.c: Limited to 6836 bytes.
D: alsa-sink.c: before: 1709
D: alsa-sink.c: after: 1709
D: alsa-sink.c: Rewound 6836 bytes.
D: sink.c: Processing rewind...
D: sink-input.c: Have to rewind 6836 bytes on render memblockq.
D: sink-input.c: Have to rewind 13672 bytes on implementor.
D: source.c: Processing rewind...
D: protocol-native.c: Requesting rewind due to rewrite.
D: alsa-sink.c: Requested to rewind 39376 bytes.
D: alsa-sink.c: Limited to 7036 bytes.
D: alsa-sink.c: before: 1759
D: alsa-sink.c: after: 1759
D: alsa-sink.c: Rewound 7036 bytes.
D: sink.c: Processing rewind...
D: sink-input.c: Have to rewind 7036 bytes on render memblockq.
D: sink-input.c: Have to rewind 14072 bytes on implementor.
D: source.c: Processing rewind...

And it goes on and on and on, until at some point it plays ok for few
minutes, then starts skipping again.

As for machine, it has onboard audio:
Audio device: ATI Technologies Inc RS780 Azalia controller

-- 
audio skips, pulseaudio -vvv shows underrun in module-alsa-sink.c
https://bugs.launchpad.net/bugs/388081
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