Public bug reported:

Taking off the headphone from usb giving panic. Also it is not giving
output from headphones at all.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: alsa-base 1.0.25+dfsg-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-35.55-generic 3.2.34
Uname: Linux 3.2.0-35-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu15.1
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: PCH [HDA Intel PCH], device 0: CONEXANT Analog [CONEXANT Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  kranthikud   2710 F.... pulseaudio
 /dev/snd/pcmC0D0p:   kranthikud   2710 F...m pulseaudio
Card0.Amixer.info:
 Card hw:0 'PCH'/'HDA Intel PCH at 0xeb610000 irq 46'
   Mixer name   : 'Intel PantherPoint HDMI'
   Components   : 'HDA:14f1506e,17aa400b,00100003 
HDA:80862806,80860101,00100000'
   Controls      : 15
   Simple ctrls  : 7
Date: Fri Jan  4 10:26:05 2013
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 
(20120823.1)
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_IN:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_IN
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH successful
Symptom_Card: Built-in Audio - HDA Intel PCH
Symptom_Jack: Black Headphone Out, Right
Symptom_PulsePlaybackTest: PulseAudio playback test successful
Symptom_Type: None of the above
Title: [IdeaPad U410, Conexant CX20590, Black Headphone Out, Right] Playback 
problem
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/05/2012
dmi.bios.vendor: LENOVO
dmi.bios.version: 65CN15WW
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Lenovo
dmi.board.vendor: LENOVO
dmi.board.version: Lenovo U410
dmi.chassis.asset.tag: Asset Tag
dmi.chassis.type: 9
dmi.chassis.vendor: Intel Corporation
dmi.chassis.version: 0.1
dmi.modalias: 
dmi:bvnLENOVO:bvr65CN15WW:bd06/05/2012:svnLENOVO:pnIdeaPadU410:pvrLenovoU410:rvnLENOVO:rnLenovo:rvrLenovoU410:cvnIntelCorporation:ct9:cvr0.1:
dmi.product.name: IdeaPad U410
dmi.product.version: Lenovo U410
dmi.sys.vendor: LENOVO

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


** Tags: amd64 apport-bug precise running-unity third-party-packages

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https://bugs.launchpad.net/bugs/1095932

Title:
  [IdeaPad U410, Conexant CX20590, Black Headphone Out, Right] Playback
  problem

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