Public bug reported:
I have not tested this with external mic, but internal mic recording is very
noisy and the sound is hardly audible when I play the recorded audio.
Running Ubuntu 11.10. upgraded from 11.04. 11.04 also had the same problem.
It's a dual boot machine. Mic works fine in Windows 7.
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: alsa-base 1.0.24+dfsg-0ubuntu2
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic-pae 3.0.4
Uname: Linux 3.0.0-12-generic-pae i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.23-0ubuntu4
Architecture: i386
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: CONEXANT Analog [CONEXANT Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: ish 1512 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xc0800000 irq 47'
Mixer name : 'Intel CougarPoint HDMI'
Components : 'HDA:14f1506c,1025054f,00100000
HDA:80862805,80860101,00100000'
Controls : 25
Simple ctrls : 13
Date: Sat Nov 12 13:59:40 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
PackageArchitecture: all
ProcEnviron:
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaRecordingTest: ALSA recording test through plughw:PCH failed
Symptom_Card: Internal Audio - HDA Intel PCH
Symptom_Jack: Mic, Internal
Symptom_Type: High background noise, or volume is too low
Title: [Aspire 4830T, Conexant CX20588, Mic, Internal] Background noise or low
volume
UpgradeStatus: Upgraded to oneiric on 2011-11-09 (3 days ago)
dmi.bios.date: 05/06/2011
dmi.bios.vendor: Acer
dmi.bios.version: V1.04
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: JM40_HR
dmi.board.vendor: Acer
dmi.board.version: Base Board Version
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V1.04
dmi.modalias:
dmi:bvnAcer:bvrV1.04:bd05/06/2011:svnAcer:pnAspire4830T:pvrV1.04:rvnAcer:rnJM40_HR:rvrBaseBoardVersion:cvnAcer:ct10:cvrV1.04:
dmi.product.name: Aspire 4830T
dmi.product.version: V1.04
dmi.sys.vendor: Acer
mtime.conffile..etc.modprobe.d.alsa.base.conf: 2011-11-08T05:03:44.117207
** Affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386 oneiric
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https://bugs.launchpad.net/bugs/889629
Title:
[Aspire 4830T, Conexant CX20588, Mic, Internal] Background noise or
low volume
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