Public bug reported:

Pulseaudio sound randomly becomes scratchy.
After logout and login, when pulseaudio is restarted everything is back to 
normal...
The sound scratching is system-wide.
Hmm, apport should automaticly send all needed logs.
Please tell me if I can provide any additional informations, I don't know...It 
is just happening really randomly.

MacBook 5,1 Alu running Ubuntu 11.10(EFI boot)

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: pulseaudio 1:1.0-0ubuntu3.1
ProcVersionSignature: Ubuntu 3.0.0-15.24-generic 3.0.13
Uname: Linux 3.0.0-15-generic x86_64
NonfreeKernelModules: nvidia wl
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  krzysiek2   1862 F.... pulseaudio
 /dev/snd/pcmC0D0p:   krzysiek2   1862 F...m pulseaudio
Card0.Amixer.info:
 Card hw:0 'NVidia'/'HDA NVidia at 0xd3380000 irq 16'
   Mixer name   : 'Realtek ALC889A'
   Components   : 'HDA:10ec0885,106b3f00,00100103'
   Controls      : 36
   Simple ctrls  : 20
Date: Thu Dec 15 19:52:42 2011
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110808)
SourcePackage: pulseaudio
UpgradeStatus: Upgraded to oneiric on 2011-09-23 (83 days ago)
dmi.bios.date: 04/27/09
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MB51.88Z.007D.B03.0904271443
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-F42D89C8
dmi.board.vendor: Apple Inc.
dmi.board.version: Proto
dmi.chassis.asset.tag: Asset Tag#
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-F42D89C8
dmi.modalias: 
dmi:bvnAppleInc.:bvrMB51.88Z.007D.B03.0904271443:bd04/27/09:svnAppleInc.:pnMacBook5,1:pvr1.0:rvnAppleInc.:rnMac-F42D89C8:rvrProto:cvnAppleInc.:ct10:cvrMac-F42D89C8:
dmi.product.name: MacBook5,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.

** Affects: pulseaudio (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug oneiric running-unity

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Title:
  Pulseaudio sound randomly becomes scratchy

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