*** This bug is a security vulnerability ***
Private security bug reported:
Sound plays fine one minute, then goes crazy the next. Skipping,
crackling, distortion..
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: alsa-base 1.0.25+dfsg-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-29.46-generic 3.2.24
Uname: Linux 3.2.0-29-generic i686
NonfreeKernelModules: wl
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
AplayDevices:
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
ApportVersion: 2.0.1-0ubuntu14
Architecture: i386
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: shonsaylor 1880 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xfc300000 irq 44'
Mixer name : 'Realtek ALC268'
Components : 'HDA:10ec0268,1025011c,00100003
HDA:11c11040,10250100,00100200'
Controls : 22
Simple ctrls : 13
Date: Thu Nov 8 12:51:25 2012
PackageArchitecture: all
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
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: Speaker, Internal
Symptom_PulsePlaybackTest: PulseAudio playback test successful
Symptom_Type: Underruns, dropouts, or "crackling" sound
Title: [Extensa 4220, Realtek ALC268, Speaker, Internal] Underruns, dropouts or
crackling sound
UpgradeStatus: Upgraded to precise on 2012-08-31 (69 days ago)
dmi.bios.date: 03/21/2008
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: V1.33
dmi.board.name: Biwa
dmi.board.vendor: Acer
dmi.board.version: Rev
dmi.chassis.asset.tag: None
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: N/A
dmi.modalias:
dmi:bvnPhoenixTechnologiesLTD:bvrV1.33:bd03/21/2008:svnAcer:pnExtensa4220:pvr0100:rvnAcer:rnBiwa:rvrRev:cvnAcer:ct10:cvrN/A:
dmi.product.name: Extensa 4220
dmi.product.version: 0100
dmi.sys.vendor: Acer
** Affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386 precise running-unity
** Information type changed from Public to Private Security
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https://bugs.launchpad.net/bugs/1076487
Title:
When I watch videos, the sound crackles, skips and becomes very
distorted.
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