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[Launchpad Bug Tracker <1315281@xxxxxxxxxxxxxxxxxx>]

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Occasionally my Lenovo t440s starts to make a constant crackling /
humming sound. This doesn't stop sound from being played, but if no
sound is playing, the noise persists.

As it's a new laptop, I thought it might be a hardware issue. It almost
sounds like a bad earth connection.

However, the culprit seems to be pulseaudio since killing it and
restarting solves the problem.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: pulseaudio 1:4.0-0ubuntu11
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC1:  james      2843 F.... pulseaudio
 /dev/snd/pcmC1D0p:   james      2843 F...m pulseaudio
 /dev/snd/controlC0:  james      2843 F.... pulseaudio
CurrentDesktop: Unity
Date: Fri May  2 09:09:37 2014
InstallationDate: Installed on 2014-04-11 (20 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Daily amd64 (20140409)
SourcePackage: pulseaudio
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/10/2014
dmi.bios.vendor: LENOVO
dmi.bios.version: GJET71WW (2.21 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20AQCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: 0B98405 STD
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrGJET71WW(2.21):bd02/10/2014:svnLENOVO:pn20AQCTO1WW:pvrThinkPadT440s:rvnLENOVO:rn20AQCTO1WW:rvr0B98405STD:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 20AQCTO1WW
dmi.product.version: ThinkPad T440s
dmi.sys.vendor: LENOVO

** Affects: skype (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug trusty
-- 
pulseaudio occasionally makes constant crackling / humming sound until killed
https://bugs.launchpad.net/bugs/1315281
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