Public bug reported:
For any application using sound:
Every 10 seconds there is a "hiccup" or stutter. This is clearly seen
in the System Monitor as a brief bump in the CPU graph from about 42% to
64%.
Also, at the command line, using top, immediately after each stutter a
new process appears briefly: kslowdxxx. A new process appears for each
stutter, so about every 10 seconds.
I almost hate to complicate this, but for about 5% of cold boots the
above behavior does not occur, and sound plays correctly in all
apllications. I have attached an apport-bug --file-bug report for an
instance of this rare situation: apport_good.txt. Perhaps it will help
shed some light.
ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: alsa-base 1.0.23+dfsg-1ubuntu4
ProcVersionSignature: Ubuntu 2.6.35-22.33-generic 2.6.35.4
Uname: Linux 2.6.35-22-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: i386
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: reidi 1401 F.... pulseaudio
/dev/snd/pcmC0D0p: reidi 1401 F...m pulseaudio
Card0.Amixer.info:
Card hw:0 'I82801DBICH4'/'Intel 82801DB-ICH4 with STAC9750,51 at irq 11'
Mixer name : 'SigmaTel STAC9750,51'
Components : 'AC97a:83847650'
Controls : 31
Simple ctrls : 21
Date: Mon Oct 11 14:29:52 2010
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release Candidate i386
(20100928)
PackageArchitecture: all
ProcEnviron:
LANG=en_US.utf8
SHELL=/bin/bash
SelectedCard: 0 I82801DBICH4 ICH4 - Intel 82801DB-ICH4
SourcePackage: alsa-driver
SpeakerTestAlsaStderr:
W r i t e e r r o r : - 3 2 , B r o k e n p i p e
W r i t e e r r o r : - 3 2 , B r o k e n p i p e
Symptom: audio
Title: [ICH4 - Intel 82801DB-ICH4] Playback problem
dmi.bios.date: 11/01/2004
dmi.bios.vendor: FUJITSU // Phoenix Technologies Ltd.
dmi.bios.version: Version 1.13
dmi.board.name: FJNB182
dmi.board.vendor: FUJITSU
dmi.chassis.type: 10
dmi.chassis.vendor: ASS0F1A88B112000
dmi.modalias:
dmi:bvnFUJITSU//PhoenixTechnologiesLtd.:bvrVersion1.13:bd11/01/2004:svnFUJITSU:pnLifeBookSSeries:pvr:rvnFUJITSU:rnFJNB182:rvr:cvnASS0F1A88B112000:ct10:cvr:
dmi.product.name: LifeBook S Series
dmi.sys.vendor: FUJITSU
** Affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386 maverick
--
[ICH4 - Intel 82801DB-ICH4] Playback problem
https://bugs.launchpad.net/bugs/658747
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