Public bug reported:

Sound is heavily distorted, lowering PCM volume in alsamixer makes sound
a little bit less noisy.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: alsa-base 1.0.25+dfsg-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-18.29-generic-pae 3.2.9
Uname: Linux 3.2.0-18-generic-pae i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.94.1-0ubuntu2
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  merike     1708 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xd4340000 irq 45'
   Mixer name   : 'Conexant CX20551 (Waikiki)'
   Components   : 'HDA:14f15047,103c30b2,00100000'
   Controls      : 17
   Simple ctrls  : 9
Date: Mon Mar 12 21:09:50 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha i386 (20120312)
PackageArchitecture: all
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:Intel successful
Symptom_Card: Built-in Audio - HDA Intel
Symptom_Jack: Black Headphone Out, Front
Symptom_PulsePlaybackTest: PulseAudio playback test successful
Symptom_Type: Digital clip or distortion, or "overdriven" sound
Title: [HP Pavilion dv2000 (RN067EA#ABB), Conexant CX20551 (Waikiki), Black 
Headphone Out, Front] Sound is distorted
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/27/2007
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.39
dmi.board.name: 30B2
dmi.board.vendor: Wistron
dmi.board.version: 61.65
dmi.chassis.type: 10
dmi.chassis.vendor: Wistron
dmi.chassis.version: N/A
dmi.modalias: 
dmi:bvnHewlett-Packard:bvrF.39:bd08/27/2007:svnHewlett-Packard:pnHPPaviliondv2000(RN067EA#ABB):pvrF.39:rvnWistron:rn30B2:rvr61.65:cvnWistron:ct10:cvrN/A:
dmi.product.name: HP Pavilion dv2000 (RN067EA#ABB)
dmi.product.version: F.39
dmi.sys.vendor: Hewlett-Packard

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


** Tags: apport-bug i386 precise

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https://bugs.launchpad.net/bugs/953303

Title:
  [HP Pavilion dv2000 (RN067EA#ABB), Conexant CX20551 (Waikiki), Black
  Headphone Out, Front] Sound is distorted

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