Public bug reported:
Ever since a recent software update (within the last month or so), audio
quality is terrible. I've plugged in various sets of speakers, and the
quality is consistent, so it's definitely a software bug.
The distortion is in the higher frequencies, and might be describe as a
whine or a buzz.
ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: alsa-base 1.0.25+dfsg-0ubuntu3
ProcVersionSignature: Ubuntu 3.5.0-23.35-generic 3.5.7.2
Uname: Linux 3.5.0-23-generic x86_64
ApportVersion: 2.6.1-0ubuntu10
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: ben 2297 F.... pulseaudio
CurrentDmesg:
[ 103.664378] end_request: I/O error, dev fd0, sector 0
[ 103.688370] end_request: I/O error, dev fd0, sector 0
Date: Wed Feb 6 19:38:40 2013
InstallationDate: Installed on 2012-05-26 (256 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64
(20120425)
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
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: Green Line Out, Rear
Symptom_PulsePlaybackTest: PulseAudio playback test successful
Symptom_Type: Digital clip or distortion, or "overdriven" sound
Title: [, SigmaTel STAC9227, Green Line Out, Rear] Sound is distorted
UpgradeStatus: Upgraded to quantal on 2012-10-23 (106 days ago)
dmi.bios.date: 09/06/2007
dmi.bios.vendor: Intel Corp.
dmi.bios.version: CO96510J.86A.5960.2007.0906.0130
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: DQ965GF
dmi.board.vendor: Intel Corporation
dmi.board.version: AAD41676-601
dmi.chassis.type: 3
dmi.modalias:
dmi:bvnIntelCorp.:bvrCO96510J.86A.5960.2007.0906.0130:bd09/06/2007:svn:pn:pvr:rvnIntelCorporation:rnDQ965GF:rvrAAD41676-601:cvn:ct3:cvr:
** Affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug quantal
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https://bugs.launchpad.net/bugs/1117971
Title:
High frequency audio is distorted
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