Public bug reported:

Sound gets killed when headphones (unplugged+replugged) into headphone
jack. I've tried all the prelim and advanced troubshooting tips on the
audio trouble shooting page
(https://wiki.ubuntu.com/DebuggingSoundProblems) and only a reboot
restores sound after a simple headphone unplug+replug operation.
Rebooting...

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: alsa-base 1.0.24+dfsg-0ubuntu2
ProcVersionSignature: Ubuntu 3.0.0-17.30-generic-pae 3.0.22
Uname: Linux 3.0.0-17-generic-pae i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.23-0ubuntu4
Architecture: i386
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  joel       1496 F.... pulseaudio
 /dev/snd/pcmC0D0p:   joel       1496 F...m pulseaudio
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xfe978000 irq 45'
   Mixer name   : 'Realtek ALC888'
   Components   : 'HDA:10ec0888,105b0d77,00100202'
   Controls      : 22
   Simple ctrls  : 11
Date: Tue Apr 10 23:04:14 2012
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_Card: Internal Audio - HDA Intel
Symptom_Jack: Black Headphone Out, Front
Symptom_Type: Sound works for a while, then breaks
Title: [nT435/nT535, Realtek ALC888, Black Headphone Out, Front] fails after a 
while
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/28/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P02
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: NETBOX nT-435/535
dmi.board.vendor: FOXCONN
dmi.board.version: Ver 0.001
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrP02:bd01/28/2011:svnFOXCONN:pnnT435/nT535:pvrVer0.001:rvnFOXCONN:rnNETBOXnT-435/535:rvrVer0.001:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: nT435/nT535
dmi.product.version: Ver 0.001
dmi.sys.vendor: FOXCONN

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


** Tags: apport-bug i386 oneiric

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https://bugs.launchpad.net/bugs/978601

Title:
  [nT435/nT535, Realtek ALC888, Black Headphone Out, Front] fails after
  a while

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