[Expired for alsa-driver (Ubuntu) because there has been no activity for
60 days.]
** Changed in: alsa-driver (Ubuntu)
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1183366
Title:
Audio volume drops to 0 for a few milliseconds every few seconds
Status in alsa-driver package in Ubuntu:
Expired
Bug description:
When having a continuous source of sound playing (like listening to
music), one can hear that the volume of the music drops to 0 every few
seconds (roughly every 10 seconds with a large variance, sometimes
twice a second, sometimes only once a minute) and resumes the previous
value after a few milliseconds (maybe 100 or so). This is really
annoying and makes listening to music a pain because it results in
some crackling.
Strangely enough, I can even observe the behaviour in alsa-mixer.
Whenever the volume drops, I can see how the sliders for Surround,
Center, LFE and Side quickly get muted (I see the "MM" appear below
the slider for a split second) and then resume the previous volume. On
top of that, the Master slider sometimes increases by a few percent
and resumes the previous level. This happens less frequent than the
mutes, but is equally annoying.
I can reproduce this behaviour both from a Kubuntu 13.04 LiveCD
without any additional programs installed as well as from the command
line without running X. Furthermore, Kubuntu 12.10 and 12.04 LTS
already had this problem. I tried uninstalling pulseaudio which did
not solve the problem. Upgrading to the latest alsa version as listed
under <https://wiki.ubuntu.com/Audio/UpgradingAlsa> did not solve the
problem either (I could only use the DKMS solution because apt
couldn't find the snapshot packages after adding the audio-dev
repository) I disconnected the headphones as well as the mic, no
change... The problem does not occur under Windows, so I can more or
less certainly eliminate a h/w-problem...
ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: alsa-base 1.0.25+dfsg-0ubuntu4
ProcVersionSignature: Ubuntu 3.8.0-21.32-generic 3.8.8
Uname: Linux 3.8.0-21-generic x86_64
ApportVersion: 2.9.2-0ubuntu8
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: langnert 2323 F.... pulseaudio
CurrentDmesg: Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order
/var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: Permission
denied
Date: Thu May 23 13:48:45 2013
InstallationDate: Installed on 2013-05-23 (0 days ago)
InstallationMedia: Kubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH failed
Symptom_Card: Built-in Audio - HDA Intel PCH
Symptom_Jack: Green Headphone Out, Front
Symptom_PulseAudioLog:
Symptom_Type: Underruns, dropouts, or "crackling" sound
Title: [System Product Name, Realtek ALC892, Green Headphone Out, Front]
Underruns, dropouts or crackling sound
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/09/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0501
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: P8Z68-V PRO
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr0501:bd05/09/2011:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP8Z68-VPRO:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
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