Public bug reported:

Tried 
https://wiki.ubuntu.com/Audio/InstallingLinuxAlsaDriverModules
http://ubuntuforums.org/showthread.php?t=1744966
All methods failed. No luck with alsa.
no output is registered.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: alsa-base 1.0.24+dfsg-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-12.51-generic-pae 2.6.38.8
Uname: Linux 2.6.38-12-generic-pae i686
NonfreeKernelModules: fglrx wl
AlsaVersion:
 Advanced Linux Sound Architecture Driver Version 1.0.24.
 Compiled on Oct  6 2011 for kernel 2.6.38-12-generic-pae (SMP).
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: SB [HDA ATI SB], device 0: HDA Generic [HDA Generic]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: SB [HDA ATI SB], device 0: HDA Generic [HDA Generic]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  fleshfire   1892 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'SB'/'HDA ATI SB at 0xd2400000 irq 16'
   Mixer name   : 'Realtek ID 268'
   Components   : 'HDA:10ec0268,103c3045,00100003 
HDA:10573055,103c3045,00100700'
   Controls      : 2
   Simple ctrls  : 2
Date: Sat Nov 26 21:50:03 2011
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:SB failed
Symptom_Card: Internal Audio - HDA ATI SB
Symptom_DevicesInUse:
 1892/dev/snd/controlC0:  fleshfire  F.... pulseaudio
 ND
Symptom_Jack: Black Headphone Out, Front
Symptom_Type: No sound at all
Title: [HP TouchSmart tx2 Notebook PC, Realtek ID 268, Black Headphone Out, 
Front] No sound at all
UpgradeStatus: Upgraded to natty on 2011-11-26 (0 days ago)
dmi.bios.date: 02/17/2009
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.12
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 3045
dmi.board.vendor: Quanta
dmi.board.version: 16.09
dmi.chassis.type: 10
dmi.chassis.vendor: Quanta
dmi.chassis.version: N/A
dmi.modalias: 
dmi:bvnHewlett-Packard:bvrF.12:bd02/17/2009:svnHewlett-Packard:pnHPTouchSmarttx2NotebookPC:pvrRev1:rvnQuanta:rn3045:rvr16.09:cvnQuanta:ct10:cvrN/A:
dmi.product.name: HP TouchSmart tx2 Notebook PC
dmi.product.version: Rev 1
dmi.sys.vendor: Hewlett-Packard

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


** Tags: apport-bug i386 natty running-unity

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https://bugs.launchpad.net/bugs/896781

Title:
  [HP TouchSmart tx2 Notebook PC, Realtek ID 268, Black Headphone Out,
  Front] No sound at all

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