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

[klerfayt]

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

[klerfayt (klerfayt-deactivatedaccount)]

I tried options snd-hda-intel position_fix=1 and options snd-hda-intel position_fix=2 in /etc/modprobe.d/alsa-base.conf file - no change;
I tried load-module module-udev-detect tsched=0 in /etc/pulse/default.pa - no change.

The only thing that helps is lowering PCM volume to -10.00 dB gain. Unfortunately PCM resets to 100 after reboot or whenever I use volume control on the panel.

[klerfayt (klerfayt-deactivatedaccount)]

gksudo gedit /usr/share/pulseaudio/alsa-mixer/paths/analog-output.conf.common

and changing

[Element PCM]
switch = mute
volume = merge

to

[Element PCM]
switch = mute
volume = ignore

fixes PCM volume reset

[Raymond (superquad-vortex2)]

the amp out conncted to CD node 0x16 should be muted or create a CD playback switch

Node 0x19 [Audio Mixer] wcaps 0x20050b: Stereo Amp-In
  Control: name="Mic Playback Volume", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=2, ofs=0
  Control: name="Mic Playback Switch", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=2, ofs=0
  Amp-In caps: ofs=0x17, nsteps=0x1e, stepsize=0x05, mute=1
  Amp-In vals: [0x17 0x17] [0x80 0x80] [0x80 0x80] [0x17 0x17]
  Power states: D0 D1 D2 D3
  Power: setting=D0, actual=D0
  Connection: 4
     0x10 0x1b 0x1a 0x16

Node 0x16 [Pin Complex] wcaps 0x400401: Stereo
  Pincap 0x00000060: IN Balanced
  Pin Default 0x94330121: [Fixed] CD at Int Right
    Conn = ATAPI, Color = Unknown
    DefAssociation = 0x2, Sequence = 0x1
    Misc = NO_PRESENCE
  Pin-ctls: 0x20: IN
  Power states: D0 D1 D2 D3
  Power: setting=D0, actual=D0

[Marcus Tomlinson (marcustomlinson)]

This release of Ubuntu is no longer receiving maintenance updates. If this is still an issue on a maintained version of Ubuntu please let us know.

[Launchpad Janitor (janitor)]

[Expired for alsa-driver (Ubuntu) because there has been no activity for 60 days.]