When I listen to music tracks in Rhythmbox, it works ok until I change tracks, then the CPU goes to around 50%, and the machine slows down. If I open sound preferences and change the profile from Analog Surround 5.1 Sound to Analog Stereo Output, it seems to clear the problem until I change a track again.
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
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: i386
Card0.Amixer.info:
Card hw:0 'CA0106'/'Audigy SE [SB0570] at 0xa800 irq 18'
Mixer name : 'CA0106'
Components : ''
Controls : 35
Simple ctrls : 18
Date: Mon Oct 11 19:52:42 2010
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
PackageArchitecture: all
ProcEnviron:
LANG=en_GB.utf8
SHELL=/bin/bash
SelectedCard: 0 CA0106 CA0106 - CA0106
SourcePackage: alsa-driver
Symptom: audio
Title: [CA0106 - CA0106] Surround problem
dmi.bios.date: 01/19/2006
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: 6.00 PG
dmi.board.name: C51MCP51
dmi.board.vendor: WinFast
dmi.board.version: FAB1.0
dmi.chassis.type: 3
dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvr6.00PG:bd01/19/2006:svnWinFast:pnC51GM03:pvrFAB1.0:rvnWinFast:rnC51MCP51:rvrFAB1.0:cvn:ct3:cvr:
dmi.product.name: C51GM03
dmi.product.version: FAB1.0
dmi.sys.vendor: WinFast
This is likely a dupe of bug 445849.