Public bug reported:

Occasionally when beginning playback of a file in Rhythmbox, the CPU
spikes to 100% and either shows stuttering progress on the the playback
counter with no audio, or plays several seconds of distortion before the
CPU drops down and the music begins playing.  Does not happen
consistently with the same files, and attempting to play the same file
back to back can have different results.  I am using S/PDIF out to a
receiver.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: alsa-base 1.0.23+dfsg-1ubuntu4
ProcVersionSignature: Ubuntu 2.6.35-25.44-generic 2.6.35.10
Uname: Linux 2.6.35-25-generic i686
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: i386
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  stephen    1550 F.... pulseaudio
 /dev/snd/pcmC0D2p:   stephen    1550 F...m pulseaudio
 /dev/snd/timer:      stephen    1550 f.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'nForce2'/'NVidia nForce2 with ALC650F at irq 20'
   Mixer name   : 'Realtek ALC650F'
   Components   : 'AC97a:414c4723'
   Controls      : 50
   Simple ctrls  : 33
Card1.Amixer.info:
 Card hw:1 'UART'/'MPU-401 UART at 0x330, irq 10'
   Mixer name   : ''
   Components   : ''
   Controls      : 0
   Simple ctrls  : 0
Card1.Amixer.values:
 
Date: Mon Jan 31 02:38:58 2011
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
PackageArchitecture: all
ProcEnviron:
 LANG=en_US.utf8
 SHELL=/bin/bash
SelectedCard: 0 nForce2 NFORCE - NVidia nForce2
SourcePackage: alsa-driver
Symptom: audio
Title: [NFORCE - NVidia nForce2] ALSA test tone not correctly played back
dmi.bios.date: 11/12/2004
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: ASUS A7N8X-E Deluxe ACPI BIOS Rev 1013
dmi.board.name: A7N8X-E
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: REV 2.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufactture
dmi.chassis.version: Chassis Version
dmi.modalias: 
dmi:bvnPhoenixTechnologies,LTD:bvrASUSA7N8X-EDeluxeACPIBIOSRev1013:bd11/12/2004:svnASUSTeKComputerINC.:pnA7N8X-E:pvrREV2.xx:rvnASUSTeKComputerINC.:rnA7N8X-E:rvrREV2.xx:cvnChassisManufactture:ct3:cvrChassisVersion:
dmi.product.name: A7N8X-E
dmi.product.version: REV 2.xx
dmi.sys.vendor: ASUSTeK Computer INC.

** Affects: alsa-driver (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 maverick

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https://bugs.launchpad.net/bugs/710526

Title:
  [NFORCE - NVidia nForce2] Audio does not play back in Rhythmbox

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