Public bug reported:

When LiveCD session sound capture work.
Right after installation it doesn't.
Ubuntu 10.04_amd64.
Notebook Aser Aspire 5110.

Workaround.
After installation make next:
In file /etc/modprobe.d/alsa-base.conf
add string:
options snd-hda-intel position_fix=1,
and restart.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: alsa-base 1.0.22.1+dfsg-0ubuntu3
ProcVersionSignature: Ubuntu 2.6.32-22.33-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-22-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  leo-lucid   1998 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'SB'/'HDA ATI SB at 0xf8400000 irq 16'
   Mixer name   : 'Realtek ALC883'
   Components   : 'HDA:10ec0883,1025009f,00100002 
HDA:14f12bfa,1025009f,00090000'
   Controls      : 23
   Simple ctrls  : 13
Date: Fri May 21 23:58:06 2010
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Alpha amd64 (20100224.1)
PackageArchitecture: all
ProcEnviron:
 PATH=(custom, user)
 LANG=ru_RU.utf8
 SHELL=/bin/bash
SourcePackage: alsa-driver
dmi.bios.date: 08/22/2008
dmi.bios.vendor: Acer
dmi.bios.version: V3.13
dmi.board.name: Navarro
dmi.board.vendor: Acer
dmi.board.version: N/A
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: N/A
dmi.modalias: 
dmi:bvnAcer:bvrV3.13:bd08/22/2008:svnAcer:pnAspire5110:pvrV3.13:rvnAcer:rnNavarro:rvrN/A:cvnAcer:ct10:cvrN/A:
dmi.product.name: Aspire 5110
dmi.product.version: V3.13
dmi.sys.vendor: Acer

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

-- 
Sound capture (microphone) works on LiveCD, but don't work after installation
https://bugs.launchpad.net/bugs/583983
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