Public bug reported:
When running PulseAudio, if I'm playing music via any source (Exaile, Totem,
Flash in Firefox or Chromium, VLC, etc.) every few minutes the audio will skip
once or twice. top doesn't show any process eating CPU any more when it
happens. dmesg doesn't show anything. Nothing else seems to be affected. It
doesn't seem to happen regularly.
I just installed Ubuntu 12.04 from scratch (with pulseaudio 1:1.1-0ubuntu15),
but the same thing happened in 10.04 on the same hardware. Uninstalling the
PulseAudio packages and going back to ALSA gives me no issues whatsoever, which
is how I know the issue is with PulseAudio. I'm using my onboard audio device:
$ lspci | grep Audio
00:14.2 Audio device: Advanced Micro Devices [AMD] nee ATI SBx00 Azalia (Intel
HDA)
Following mailing list instructions, pulseaudio -vvvv --log-time shows during a
skip:
( 684.030| 5.000) I: [alsa-sink] alsa-sink.c: Underrun!
( 684.030| 0.000) I: [alsa-sink] alsa-sink.c: Increasing minimal latency to
26.00 ms
( 684.030| 0.000) D: [alsa-sink] alsa-sink.c: Latency set to 26.00ms
( 684.030| 0.000) D: [alsa-sink] alsa-sink.c: hwbuf_unused=60952
( 684.030| 0.000) D: [alsa-sink] alsa-sink.c: setting avail_min=15944
( 684.030| 0.000) D: [alsa-sink] alsa-sink.c: Latency set to 26.00ms
( 684.030| 0.000) D: [alsa-sink] alsa-sink.c: hwbuf_unused=60952
( 684.030| 0.000) D: [alsa-sink] alsa-sink.c: setting avail_min=15944
( 684.031| 0.000) D: [alsa-sink] protocol-native.c: Underrun on 'ALSA
Playback', 0 bytes in queue.
( 684.036| 0.004) D: [alsa-sink] protocol-native.c: Requesting rewind due to
end of underrun.
( 684.036| 0.000) D: [alsa-sink] alsa-sink.c: Requested to rewind 10940
bytes.
( 684.036| 0.000) D: [alsa-sink] alsa-sink.c: Limited to 3320 bytes.
( 684.036| 0.000) D: [alsa-sink] alsa-sink.c: before: 830
( 684.036| 0.000) D: [alsa-sink] alsa-sink.c: after: 830
( 684.036| 0.000) D: [alsa-sink] alsa-sink.c: Rewound 3320 bytes.
( 684.036| 0.000) D: [alsa-sink] sink.c: Processing rewind...
( 684.036| 0.000) D: [alsa-sink] sink.c: latency = 1337
( 684.036| 0.000) D: [alsa-sink] sink-input.c: Have to rewind 3320 bytes on
render memblockq.
( 684.036| 0.000) D: [alsa-sink] source.c: Processing rewind...
( 696.234| 12.197) I: [alsa-sink] alsa-sink.c: Underrun!
( 696.234| 0.000) I: [alsa-sink] alsa-sink.c: Increasing wakeup watermark to
15.99 ms
( 702.033| 5.799) I: [alsa-sink] alsa-sink.c: Underrun!
( 702.033| 0.000) I: [alsa-sink] alsa-sink.c: Increasing minimal latency to
36.00 ms
( 702.033| 0.000) D: [alsa-sink] alsa-sink.c: Latency set to 36.00ms
( 702.033| 0.000) D: [alsa-sink] alsa-sink.c: hwbuf_unused=59188
( 702.033| 0.000) D: [alsa-sink] alsa-sink.c: setting avail_min=15680
( 702.033| 0.000) D: [alsa-sink] alsa-sink.c: Latency set to 36.00ms
( 702.034| 0.000) D: [alsa-sink] alsa-sink.c: hwbuf_unused=59188
( 702.034| 0.000) D: [alsa-sink] alsa-sink.c: setting avail_min=15680
( 702.034| 0.000) D: [alsa-sink] protocol-native.c: Underrun on 'ALSA
Playback', 0 bytes in queue.
...and it goes on.
The "Underrun!" messages alone happened a few times before, but it
didn't skip.
I'd like to use PulseAudio, but it's pretty annoying having audio skip all the
time.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: pulseaudio 1:1.1-0ubuntu15
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
Uname: Linux 3.2.0-24-generic x86_64
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: toxite 2136 F.... pulseaudio
/dev/snd/pcmC0D0p: toxite 2136 F...m pulseaudio
Card0.Amixer.info:
Card hw:0 'SB'/'HDA ATI SB at 0xfe024000 irq 16'
Mixer name : 'Realtek ALC889'
Components : 'HDA:10ec0889,1458a102,00100004'
Controls : 48
Simple ctrls : 22
Date: Tue May 8 21:45:17 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64
(20120425)
ProcEnviron:
TERM=xterm
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: pulseaudio
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/03/2009
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F2
dmi.board.name: GA-790FXTA-UD5
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias:
dmi:bvnAwardSoftwareInternational,Inc.:bvrF2:bd12/03/2009:svnGigabyteTechnologyCo.,Ltd.:pnGA-790FXTA-UD5:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-790FXTA-UD5:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: GA-790FXTA-UD5
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
** Affects: pulseaudio
Importance: Unknown
Status: Unknown
** Affects: pulseaudio (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug precise
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/996906
Title:
periodic audio skips with Intel HDA
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https://bugs.launchpad.net/pulseaudio/+bug/996906/+subscriptions
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