Public bug reported:

In the previous installed distro in AlsaMixer (v.1.0.22), under
recording i had "Capture" and "Input Source". From input source i
selected front mic (external audio jack) or ATAPI mic (computer internal
mic).

Now installed latest Pangolin, in Alsamixer (v.1.0.25) under recording i have: 
"Mic Boost", "Capture" and "Internal Mic Boost".
I guess it should automagically connect the mics, because on 
plugging/unplugging the mic boosts change.
But recording internal mic is quiet and recording external mic is noise.

Card: HDA NVidia
Chip: Realtek ALC861-VD
Comp: HP Pavilion tx1000

see also: https://bugtrack.alsa-project.org/alsa-bug/view.php?id=5578

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: alsa-utils 1.0.25-1ubuntu5
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
Uname: Linux 3.2.0-24-generic i686
NonfreeKernelModules: nvidia wl
ApportVersion: 2.0.1-0ubuntu7
Architecture: i386
Date: Sun Apr 29 14:07:37 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 
(20120423.2)
ProcEnviron:
 LANGUAGE=en_US:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-utils
UpgradeStatus: No upgrade log present (probably fresh install)

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


** Tags: apport-bug i386 precise

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https://bugs.launchpad.net/bugs/991037

Title:
  can't use microphones on HP Pavilion tx1000

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