I think it was an hardware problem and the bug should be closed.
** Changed in: alsa-driver (Ubuntu)
Status: Confirmed => Invalid
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https://bugs.launchpad.net/bugs/877973
Title:
[HDA-Intel - HDA Intel PCH, playback] Spurious jack sense events from
headphones
Status in “alsa-driver” package in Ubuntu:
Invalid
Bug description:
On my Intel DH67GD motherboard, the input event device for the front
headphones jack continuously send spurious events (when the headphones
are not connected). This causes pulseaudio to switch from digital to
analog output. Note that, if the headphones are not connected, the are
no spurious events.
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: alsa-base 1.0.24+dfsg-0ubuntu2
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.23-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: amato 2297 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xfe620000 irq 51'
Mixer name : 'Intel CougarPoint HDMI'
Components : 'HDA:10ec0892,80862001,00100302
HDA:80862805,80862805,00100000'
Controls : 43
Simple ctrls : 21
Date: Wed Oct 19 10:14:56 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
PackageArchitecture: all
ProcEnviron:
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH successful
Symptom_Card: Internal Audio - HDA Intel PCH
Symptom_PulsePlaybackTest: PulseAudio playback test successful
Symptom_Type: None of the above
Title: [HDA-Intel - HDA Intel PCH, playback] Playback problem
UpgradeStatus: Upgraded to oneiric on 2011-10-14 (4 days ago)
dmi.bios.date: 04/15/2011
dmi.bios.vendor: Intel Corp.
dmi.bios.version: BLH6710H.86A.0110.2011.0415.1506
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: DH67GD
dmi.board.vendor: Intel Corporation
dmi.board.version: AAG10206-205
dmi.chassis.type: 3
dmi.modalias:
dmi:bvnIntelCorp.:bvrBLH6710H.86A.0110.2011.0415.1506:bd04/15/2011:svn:pn:pvr:rvnIntelCorporation:rnDH67GD:rvrAAG10206-205:cvn:ct3:cvr:
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