I realize this bug is old but I can confirm it's still happening to me (Ubuntu 12.10 running on a MacBook Pro). Restarting pulseaudio (pulseaudio -k) fixes the issue... until the next time it happens :) A little annoying, but I guess it must be hard to fix do to the 'random' nature of it...
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to pulseaudio in Ubuntu. https://bugs.launchpad.net/bugs/778852 Title: Sound is distorted sometimes Status in “pulseaudio” package in Ubuntu: Confirmed Bug description: Binary package hint: pulseaudio When I'm listening to rythmbox sometimes sound becomes distorted. Sometimes it is distorted when I unpause playback, but if I pause and unpause once more it becomes fine again. I found pretty good way to reproduce though: 1) Have rythmbox playing. 2) Open video file in totem 3) Close totem 4) repeat 2-3 Always, when totem opens/closes I hear a small dropout in music. But sometimes along with dropout distortion begins. And distortion finishes when I open/close totem again. I.e. I open totem - just dropout, I close totem - distortion begins, I open totem again - distortion disappears. Distortion doesn't appear 100% of the time, but pretty often. Dropout can be heard always. This problem appeared after upgrade to Natty. Before this update I never heard any distortion on this laptop. Here is an alsa debug output when I start totem and distortion begins: --------------------------------------------------------------------------------------- I: client.c: Created 19 "Native client (UNIX socket client)" D: protocol-native.c: Protocol version: remote 16, local 16 I: protocol-native.c: Got credentials: uid=1000 gid=1000 success=1 D: protocol-native.c: SHM possible: yes D: protocol-native.c: Negotiated SHM: yes D: module-augment-properties.c: Looking for .desktop file for totem I: client.c: Freed 19 "Видеопроигрыватель Totem" I: protocol-native.c: Connection died. I: client.c: Created 20 "Native client (UNIX socket client)" D: protocol-native.c: Protocol version: remote 16, local 16 I: protocol-native.c: Got credentials: uid=1000 gid=1000 success=1 D: protocol-native.c: SHM possible: yes D: protocol-native.c: Negotiated SHM: yes D: module-augment-properties.c: Looking for .desktop file for totem I: module-stream-restore.c: Restoring volume for sink input sink-input-by-media-role:video. I: module-stream-restore.c: Restoring mute state for sink input sink-input-by-media-role:video. D: module-suspend-on-idle.c: Sink alsa_output.default becomes busy. D: memblockq.c: memblockq requested: maxlength=33554432, tlength=0, base=8, prebuf=0, minreq=1 maxrewind=0 D: memblockq.c: memblockq sanitized: maxlength=33554432, tlength=33554432, base=8, prebuf=0, minreq=8 maxrewind=0 I: sink-input.c: Created input 8 "Playback Stream" on alsa_output.default with sample spec s32le 2ch 48000Hz and channel map front-left,front-right I: sink-input.c: media.name = "Playback Stream" I: sink-input.c: application.name = "Видеопроигрыватель Totem" I: sink-input.c: native-protocol.peer = "UNIX socket client" I: sink-input.c: native-protocol.version = "16" I: sink-input.c: media.role = "video" I: sink-input.c: application.process.id = "29881" I: sink-input.c: application.process.user = "kolya" I: sink-input.c: application.process.host = "kolya-laptop" I: sink-input.c: application.process.binary = "totem" I: sink-input.c: application.icon_name = "totem" I: sink-input.c: window.x11.display = ":0.0" I: sink-input.c: application.language = "ru_RU.UTF-8" I: sink-input.c: application.process.machine_id = "3e9af0d0cb0c30aa9ae927604bde08d5" I: sink-input.c: application.process.session_id = "3e9af0d0cb0c30aa9ae927604bde08d5-1304615509.920354-630699833" I: sink-input.c: module-stream-restore.id = "sink-input-by-media-role:video" I: protocol-native.c: Requested tlength=200.00 ms, minreq=10.00 ms D: protocol-native.c: Adjust latency mode enabled, configuring sink latency to half of overall latency. D: memblockq.c: memblockq requested: maxlength=4194304, tlength=42240, base=8, prebuf=0, minreq=3840 maxrewind=0 D: memblockq.c: memblockq sanitized: maxlength=4194304, tlength=42240, base=8, prebuf=0, minreq=3840 maxrewind=0 I: protocol-native.c: Final latency 200.00 ms = 90.00 ms + 2*10.00 ms + 90.00 ms D: alsa-sink.c: Latency set to 90.00ms D: alsa-sink.c: hwbuf_unused=96512 D: alsa-sink.c: setting avail_min=15425 D: protocol-native.c: Requesting rewind due to end of underrun. D: protocol-native.c: Requesting rewind due to end of underrun. D: protocol-native.c: Requesting rewind due to end of underrun. D: protocol-native.c: Requesting rewind due to end of underrun. D: protocol-native.c: Requesting rewind due to end of underrun. D: protocol-native.c: Requesting rewind due to end of underrun. D: protocol-native.c: Requesting rewind due to end of underrun. D: sink-input.c: Requesting rewind due to uncorking D: alsa-sink.c: Requested to rewind 131072 bytes. D: module-suspend-on-idle.c: Sink alsa_output.default becomes busy. D: alsa-sink.c: Limited to 32352 bytes. D: alsa-sink.c: before: 4044 D: alsa-sink.c: after: 4044 D: alsa-sink.c: Rewound 32352 bytes. D: sink.c: Processing rewind... D: sink-input.c: Have to rewind 32352 bytes on render memblockq. D: source.c: Processing rewind... D: protocol-native.c: Requesting rewind due to end of underrun. D: alsa-sink.c: Requested to rewind 131072 bytes. D: alsa-sink.c: Limited to 32128 bytes. D: alsa-sink.c: before: 4016 D: alsa-sink.c: after: 4016 D: alsa-sink.c: Rewound 32128 bytes. D: sink.c: Processing rewind... D: sink-input.c: Have to rewind 32128 bytes on render memblockq. D: sink-input.c: Have to rewind 32128 bytes on render memblockq. D: source.c: Processing rewind... --------------------------------------------------------------------------------------- I'll be happy to provide any information I can to help resolve this issue. Thanks. ProblemType: Bug DistroRelease: Ubuntu 11.04 Package: pulseaudio 1:0.9.22+stable-queue-24-g67d18-0ubuntu3 ProcVersionSignature: Ubuntu 2.6.38-8.42-generic-pae 2.6.38.2 Uname: Linux 2.6.38-8-generic-pae i686 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23. Architecture: i386 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: kolya 22806 F.... pulseaudio /dev/snd/pcmC0D0p: kolya 22806 F...m pulseaudio /dev/snd/timer: kolya 22806 f.... pulseaudio Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xefffc000 irq 45' Mixer name : 'SigmaTel STAC9200' Components : 'HDA:83847690,102801bd,00102201 HDA:14f12bfa,14f100c3,00090000' Controls : 12 Simple ctrls : 7 Date: Fri May 6 22:50:44 2011 InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429) ProcEnviron: LANGUAGE=ru_RU:en PATH=(custom, user) LANG=ru_RU.UTF-8 SHELL=/bin/bash SourcePackage: pulseaudio UpgradeStatus: Upgraded to natty on 2011-04-30 (6 days ago) dmi.bios.date: 06/13/2007 dmi.bios.vendor: Dell Inc. dmi.bios.version: A17 dmi.board.name: 0XD720 dmi.board.vendor: Dell Inc. dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA17:bd06/13/2007:svnDellInc.:pnMM061:pvr:rvnDellInc.:rn0XD720:rvr:cvnDellInc.:ct8:cvr: dmi.product.name: MM061 dmi.sys.vendor: Dell Inc. mtime.conffile..etc.pulse.default.pa: 2011-05-06T12:21:54.526814 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/778852/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
