[HP Pavilion dm1 Notebook PC, IDT 92HD81B1X5, Grey Headphone Out, Right] fails after a while

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problem in audio driver, the sound stops working and starts going faster and the status bar of sound, this problem happens with all programs sound. only solves restarting Linux.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: alsa-base 1.0.25+dfsg-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-18.29-generic 3.2.9
Uname: Linux 3.2.0-18-generic x86_64
NonfreeKernelModules: wl
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.94.1-0ubuntu2
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 1: SB [HDA ATI SB], device 0: STAC92xx Analog [STAC92xx Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: harley 2054 F.... pulseaudio
 /dev/snd/pcmC1D0p: harley 2054 F...m pulseaudio
 /dev/snd/controlC0: harley 2054 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'Generic'/'HD-Audio Generic at 0xf0244000 irq 42'
   Mixer name : 'ATI R6xx HDMI'
   Components : 'HDA:1002aa01,00aa0100,00100200'
   Controls : 6
   Simple ctrls : 1
Card0.Amixer.values:
 Simple mixer control 'IEC958',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
Card1.Amixer.info:
 Card hw:1 'SB'/'HDA ATI SB at 0xf0240000 irq 16'
   Mixer name : 'IDT 92HD81B1X5'
   Components : 'HDA:111d7605,103c1611,00100105'
   Controls : 16
   Simple ctrls : 9
Date: Sun Mar 18 06:33:16 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120301)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_Card: Áudio embutido - HDA ATI SB
Symptom_Jack: Grey Headphone Out, Right
Symptom_Type: Sound works for a while, then breaks
Title: [HP Pavilion dm1 Notebook PC, IDT 92HD81B1X5, Grey Headphone Out, Right] fails after a while
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/26/2011
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.12
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 1611
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 96.39
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.12:bd04/26/2011:svnHewlett-Packard:pnHPPaviliondm1NotebookPC:pvr058A110000252B00000300100:rvnHewlett-Packard:rn1611:rvr96.39:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.name: HP Pavilion dm1 Notebook PC
dmi.product.version: 058A110000252B00000300100
dmi.sys.vendor: Hewlett-Packard