Public bug reported:
For a long time, Ubuntu has muted the sound card whenever no audio is
played, presumably to save power. On my laptop this has two nasty side
effects. First of all, the mute button LED lights up, even though the
the volume control is not set on mute (in the user interface). Thus,
pressing the lit button does not have the expected effect of unmuting
but the opposite. Secondly, the audio device takes about two seconds to
start up after unmuting, causing short sounds not being heard at all and
the beginning of longer sounds being missing or garbled.
Lately this has getting worse, with the mute status getting toggled
roughly once per second all the time when no audio is being played. This
makes the mute button LED blink in a highly annoying manner, and it also
causes the laptop speaker to click constantly.
On this particular sound device, at least, it would seem best if the
device was never muted for power saving reasons but only when the user
actually has muted audio output.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: pulseaudio 1:1.1-0ubuntu15.1
ProcVersionSignature: Ubuntu 3.2.0-26.41-generic 3.2.19
Uname: Linux 3.2.0-26-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
AplayDevices:
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
ApportVersion: 2.0.1-0ubuntu8
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: tronic 4776 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xe0644000 irq 46'
Mixer name : 'Analog Devices AD1981'
Components : 'HDA:11d41981,103c30c9,00100200
HDA:14f12c06,103c1379,00100000'
Controls : 12
Simple ctrls : 10
Date: Tue Aug 28 08:53:31 2012
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=fi_FI.UTF-8
SHELL=/bin/bash
SourcePackage: pulseaudio
UpgradeStatus: Upgraded to precise on 2012-05-13 (106 days ago)
dmi.bios.date: 11/04/2008
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68MSP Ver. F.0E
dmi.board.name: 30C9
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 75.28
dmi.chassis.asset.tag: CNF7516B1Y
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias:
dmi:bvnHewlett-Packard:bvr68MSPVer.F.0E:bd11/04/2008:svnHewlett-Packard:pnHPCompaq2510p(RU537EA#AK8):pvrF.0E:rvnHewlett-Packard:rn30C9:rvrKBCVersion75.28:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP Compaq 2510p (RU537EA#AK8)
dmi.product.version: F.0E
dmi.sys.vendor: Hewlett-Packard
** Affects: pulseaudio (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug precise
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https://bugs.launchpad.net/bugs/1042546
Title:
Sound card is muted or mute being constantly toggled when no audio is
played
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