Public bug reported:
When plugging in headphones, the headphone sense happens properly, and
most speaker output is muted (Surround, Center, LFE), but the Front
speakers are still at regular volume. Muting the Front speakers also
mutes the Master, and sound stops to both headphone and speakers. a
workaround is to set Front to 0 after plugging the speakers with the
following command: /usr/bin/amixer -c 0 set 'Front' 0
This is a new development brought on by a recent update. Sound used to
work properly.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: alsa-base 1.0.25+dfsg-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-37.58-generic 3.2.35
Uname: Linux 3.2.0-37-generic x86_64
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu17.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: michael 1995 F.... pulseaudio
/dev/snd/controlC0: michael 1995 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xf6500000 irq 52'
Mixer name : 'Realtek ALC892'
Components : 'HDA:10ec0892,15587100,00100302'
Controls : 37
Simple ctrls : 20
Card1.Amixer.info:
Card hw:1 'NVidia'/'HDA NVidia at 0xf6080000 irq 17'
Mixer name : 'Nvidia GPU 15 HDMI/DP'
Components : 'HDA:10de0015,10de0101,00100100'
Controls : 24
Simple ctrls : 4
Date: Tue Feb 12 19:00:51 2013
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64
(20120425)
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
SHELL=/bin/bash
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
SourcePackage: alsa-driver
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/06/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 4.6.4
dmi.board.asset.tag: Not Applicable
dmi.board.name: Bonobo Professional
dmi.board.vendor: System76, Inc.
dmi.board.version: bonp5
dmi.chassis.asset.tag: Not Applicable
dmi.chassis.type: 10
dmi.chassis.vendor: System76, Inc.
dmi.chassis.version: bonp5
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr4.6.4:bd04/06/2011:svnSystem76,Inc.:pnBonoboProfessional:pvrbonp5:rvnSystem76,Inc.:rnBonoboProfessional:rvrbonp5:cvnSystem76,Inc.:ct10:cvrbonp5:
dmi.product.name: Bonobo Professional
dmi.product.version: bonp5
dmi.sys.vendor: System76, Inc.
** Affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug precise
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https://bugs.launchpad.net/bugs/1123595
Title:
Alsa does not mute speakers when headphones are plugged
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