It seems a problem with the google chrome, not with alsa.
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https://bugs.launchpad.net/bugs/1023617
Title:
Crackling Noise - Ubuntu 12.04
Status in “alsa-driver” package in Ubuntu:
Confirmed
Bug description:
I hear a crackling noise each 3 seconds.
I have an Acer Aspire 5742G / Realtek ALC272X / Speaker, Internal
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: alsa-base 1.0.25+dfsg-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-26.41-generic 3.2.19
Uname: Linux 3.2.0-26-generic x86_64
NonfreeKernelModules: fglrx
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu8
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC272X Analog [ALC272X Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: diogosg 2818 F.... pulseaudio
/dev/snd/controlC0: diogosg 2818 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xb4100000 irq 43'
Mixer name : 'Realtek ALC272X'
Components : 'HDA:10ec0272,10250487,00100001'
Controls : 21
Simple ctrls : 12
Card1.Amixer.info:
Card hw:1 'Generic'/'HD-Audio Generic at 0xb4020000 irq 44'
Mixer name : 'ATI R6xx HDMI'
Components : 'HDA:1002aa01,00aa0100,00100200'
Controls : 6
Simple ctrls : 1
Card1.Amixer.values:
Simple mixer control 'IEC958',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [on]
Date: Wed Jul 11 22:01:40 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64
(20120425)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:Intel successful
Symptom_Card: Áudio embutido - HDA Intel
Symptom_Jack: Speaker, Internal
Symptom_PulsePlaybackTest: PulseAudio playback test successful
Symptom_Type: None of the above
Title: [Aspire 5742G, Realtek ALC272X, Speaker, Internal] Playback problem
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/18/2010
dmi.bios.vendor: Acer
dmi.bios.version: V1.10
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Aspire 5742G
dmi.board.vendor: Acer
dmi.board.version: V1.10
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V1.10
dmi.modalias:
dmi:bvnAcer:bvrV1.10:bd11/18/2010:svnAcer:pnAspire5742G:pvrV1.10:rvnAcer:rnAspire5742G:rvrV1.10:cvnAcer:ct10:cvrV1.10:
dmi.product.name: Aspire 5742G
dmi.product.version: V1.10
dmi.sys.vendor: Acer
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