Public bug reported:

Internal microphone works, plugged-in microphone does not.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: alsa-base 1.0.25+dfsg-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-17.27-generic 3.2.6
Uname: Linux 3.2.0-17-generic x86_64
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.93-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  firstadmin  13635 F.... pulseaudio
 /dev/snd/pcmC0D0c:   firstadmin  13635 F...m pulseaudio
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xdb300000 irq 47'
   Mixer name   : 'Nvidia MCP77/78 HDMI'
   Components   : 'HDA:10ec0889,10250145,00100004 
HDA:11c11040,10250145,00100200 HDA:10de0006,10de0101,00100000'
   Controls      : 37
   Simple ctrls  : 20
Date: Wed Feb 29 17:28:02 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm
 PATH=(custom, user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaRecordingTest: ALSA recording test through plughw:Intel failed
Symptom_Card: Eingebautes Audio - HDA Intel
Symptom_Jack: Pink Mic, Front
Symptom_Type: Only some of inputs are working
Title: [Aspire 8930, Realtek ALC889, Pink Mic, Front] Recording problem
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/07/2008
dmi.bios.vendor: Acer
dmi.bios.version: V1.05
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Aspire 8930
dmi.board.vendor: Acer
dmi.board.version: PSMBOU-1234567
dmi.chassis.type: 1
dmi.chassis.vendor: Acer
dmi.chassis.version: N/A
dmi.modalias: 
dmi:bvnAcer:bvrV1.05:bd08/07/2008:svnAcer:pnAspire8930:pvrV1.05:rvnAcer:rnAspire8930:rvrPSMBOU-1234567:cvnAcer:ct1:cvrN/A:
dmi.product.name: Aspire 8930
dmi.product.version: V1.05
dmi.sys.vendor: Acer

** Affects: alsa-driver (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug precise

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https://bugs.launchpad.net/bugs/943386

Title:
  [Aspire 8930, Realtek ALC889, Pink Mic, Front] Recording problem

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