Public bug reported:
Hear a humming sound coming from laptop internal speakers. When I
change preferences on audio, the sound goes away for about 30 seconds,
then returns. Rather annoying. Just installed ubuntu 9.10 on the
bootcamp partitionm, macbook pro 2.2.
ProblemType: Bug
Architecture: i386
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: ekuenzli 1794 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xd8400000 irq 22'
Mixer name : 'SigmaTel STAC9221 A1'
Components : 'HDA:83847680,106b1e00,00103401'
Controls : 20
Simple ctrls : 12
CheckboxCommand: alsa_record_playback
CheckboxDescription:
Open the volume control application by right-clicking on the speaker icon in
the panel and selecting "Sound Preferences". Select the "Input" tab and choose
any alternate (non-default) device(s). Select the "Output" tab and choose any
alternate (non-default) device(s). When you are done, click the Test button,
then speak into the microphone. After a few seconds, your speech will be played
back to you.
Did you hear your speech played back?
CheckboxTest: alsa_record_playback_alternates
Date: Wed Dec 2 10:24:40 2009
DistroRelease: Ubuntu 9.10
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
Package: alsa-base 1.0.20+dfsg-1ubuntu5
PackageArchitecture: all
ProcEnviron:
SHELL=/bin/bash
LANG=en_US.UTF-8
ProcVersionSignature: Ubuntu 2.6.31-15.50-generic-pae
SourcePackage: alsa-driver
Tags: checkbox-bug
Uname: Linux 2.6.31-15-generic-pae i686
** Affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug checkbox-bug i386
--
feedback coming from Macbook Pro speakers
https://bugs.launchpad.net/bugs/491425
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