Public bug reported:

Binary package hint: pulseaudio

After some time after starting my computer, my microphone doesn't work. If I 
restart the computer, the microphone works again until enough time has passed 
(probably in the 15 minute range, but I've never tried to keep track). I can 
also make the microphone start working again by running sudo killall 
pulseaudio, which does the same thing as a restart.
(Normally, I would expect the microphone to consistently work.)
Description:    Ubuntu 10.04.1 LTS
Release:        10.04
pulseaudio:
  Installed: 1:0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu14
  Candidate: 1:0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu14
  Version table:
 *** 1:0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu14 0
        500 http://us.archive.ubuntu.com/ubuntu/ lucid/main Packages
        100 /var/lib/dpkg/status

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: alsa-base 1.0.22.1+dfsg-0ubuntu3
ProcVersionSignature: Ubuntu 2.6.32-24.42-generic 2.6.32.15+drm33.5
Uname: Linux 2.6.32-24-generic x86_64
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC1:  bjorn     13095 F.... pulseaudio
 /dev/snd/pcmC1D0p:   bjorn     13095 F...m pulseaudio
 /dev/snd/controlC0:  bjorn     13095 F.... pulseaudio
 /dev/snd/pcmC0D0c:   bjorn     13095 F...m pulseaudio
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xdcff8000 irq 22'
   Mixer name   : 'Realtek ALC662 rev1'
   Components   : 'HDA:10ec0662,10438290,00100101'
   Controls      : 36
   Simple ctrls  : 19
Card1.Amixer.info:
 Card hw:1 'default'/'C-Media USB Audio Device    at usb-0000:00:1d.7-6.2, full 
speed'
   Mixer name   : 'USB Mixer'
   Components   : 'USB0d8c:0008'
   Controls      : 5
   Simple ctrls  : 3
CheckboxSubmission: a869e808e24f1cd12a0b9ddfb6a9e84b
CheckboxSystem: fd6c484c0b5d20a2f1cd036ef0f63975
Date: Tue Sep  7 01:21:24 2010
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
PackageArchitecture: all
ProcEnviron:
 LC_CTYPE=C
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/zsh
SelectedCard: 0 Intel HDA-Intel - HDA Intel
SourcePackage: alsa-driver
Symptom: audio
Title: [Realtek ALC662 rev1] Recording problem
dmi.bios.date: 03/03/2008
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0903
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P5B-VM SE
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr0903:bd03/03/2008:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5B-VMSE:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer

** Affects: pulseaudio (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug lucid

-- 
[Realtek ALC662 rev1] Recording problem -- microphone no long works after some 
time
https://bugs.launchpad.net/bugs/632169
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