[pulseaudio-tickets] [PulseAudio] #396: Sound is Jerky with "AC'97" hardware (on Mandriva Cooker)

[PulseAudio]

#396: Sound is Jerky with "AC'97" hardware (on Mandriva Cooker)
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  Reporter:  shlomif  |       Owner:  lennart                                                   
      Type:  defect   |      Status:  new                                                       
  Priority:  highest  |   Milestone:                                                            
 Component:  core     |    Severity:  major                                                     
Resolution:           |    Keywords:  sound, jerky, bad, playback, artifacts, voice, play, ac 97
----------------------+-----------------------------------------------------
Comment (by nevion):

 Excuse the formatting screwup above reposting as I don't see an edit
 button:

 Oh wait I just noticed some interesting output:

 {{{
 I: module-alsa-sink.c: Underrun!
 D: module-alsa-sink.c: Wakeup from ALSA! OUTPUT
 D: module-alsa-sink.c: Wakeup from ALSA! OUTPUT
 D: module-alsa-sink.c: Wakeup from ALSA! OUTPUT
 E: module-alsa-sink.c: ALSA woke us up to write new data to the device,
 but there was actually nothing to write! Most likely this is an ALSA
 driver bug. Please report this issue to the PulseAudio developers.
 D: module-alsa-sink.c: Wakeup from ALSA! OUTPUT
 D: module-alsa-sink.c: Wakeup from ALSA! OUTPUT
 E: module-alsa-sink.c: ALSA woke us up to write new data to the device,
 but there was actually nothing to write! Most likely this is an ALSA
 driver bug. Please report this issue to the PulseAudio developers.
 D: module-alsa-sink.c: Wakeup from ALSA! OUTPUT
 E: module-alsa-sink.c: ALSA woke us up to write new data to the device,
 but there was actually nothing to write! Most likely this is an ALSA
 driver bug. Please report this issue to the PulseAudio developers.
 D: module-alsa-sink.c: Wakeup from ALSA! OUTPUT
 D: module-alsa-sink.c: Wakeup from ALSA! OUTPUT
 E: module-alsa-sink.c: ALSA woke us up to write new data to the device,
 but there was actually nothing to write! Most likely this is an ALSA
 driver bug. Please report this issue to the PulseAudio developers.
 D: module-alsa-sink.c: Wakeup from ALSA! OUTPUT
 D: module-alsa-sink.c: Wakeup from ALSA! OUTPUT
 D: protocol-native.c: Requesting rewind due to end of underrun.
 D: module-alsa-sink.c: Requested to rewind 63388 bytes.
 D: module-alsa-sink.c: Limited to 288 bytes.
 D: module-alsa-sink.c: before: 72
 D: module-alsa-sink.c: after: 72
 D: module-alsa-sink.c: Rewound 288 bytes.
 D: sink.c: Processing rewind...
 D: sink-input.c: Have to rewind 288 bytes on render memblockq.
 D: protocol-native.c: Requesting rewind due to end of underrun.
 D: module-alsa-sink.c: Requested to rewind 46192 bytes.
 D: module-alsa-sink.c: Mhmm, actually there is nothing to rewind.
 D: module-alsa-sink.c: Wakeup from ALSA! OUTPUT
 I: module-alsa-sink.c: Underrun!
 D: module-alsa-sink.c: Wakeup from ALSA! OUTPUT
 D: module-alsa-sink.c: Wakeup from ALSA! OUTPUT
 D: module-alsa-sink.c: Wakeup from ALSA! OUTPUT
 E: module-alsa-sink.c: ALSA woke us up to write new data to the device,
 but there was actually nothing to write! Most likely this is an ALSA
 driver bug. Please report this issue to the PulseAudio developers.
 D: module-alsa-sink.c: Wakeup from ALSA! OUTPUT
 E: module-alsa-sink.c: ALSA woke us up to write new data to the device,
 but there was actually nothing to write! Most likely this is an ALSA
 driver bug. Please report this issue to the PulseAudio developers.
 D: module-alsa-sink.c: Wakeup from ALSA! OUTPUT
 D: module-alsa-sink.c: Wakeup from ALSA! OUTPUT
 D: protocol-native.c: Requesting rewind due to end of underrun.
 D: module-alsa-sink.c: Requested to rewind 65256 bytes.
 D: module-alsa-sink.c: Limited to 512 bytes.
 D: module-alsa-sink.c: before: 128
 D: module-alsa-sink.c: after: 128
 D: module-alsa-sink.c: Rewound 512 bytes.
 }}}

 I've been staring at the output and those don't occur on a 1:1 basis with
 the underruns.

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Ticket URL: <http://www.pulseaudio.org/ticket/396#comment:10>
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