No sound at all

[Smit Dixit]

I have just installed Ubuntu. But, I am not getting any sound output since then.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: alsa-base 1.0.25+dfsg-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-25.40-generic-pae 3.2.18
Uname: Linux 3.2.0-25-generic-pae i686
NonfreeKernelModules: wl
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu8
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: smit 1624 F.... pulseaudio
 /dev/snd/controlC0: smit 1624 F.... pulseaudio
 /dev/snd/pcmC0D0p: smit 1624 F...m pulseaudio
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xda100000 irq 49'
   Mixer name : 'IDT 92HD75B3X5'
   Components : 'HDA:111d7603,103c3628,00100202'
   Controls : 23
   Simple ctrls : 13
Card1.Amixer.info:
 Card hw:1 'HDMI'/'HDA ATI HDMI at 0xda010000 irq 50'
   Mixer name : 'ATI R6xx HDMI'
   Components : 'HDA:1002aa01,00aa0100,00100100'
   Controls : 6
   Simple ctrls : 1
Card1.Amixer.values:
 Simple mixer control 'IEC958',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
Date: Sun Jun 17 18:42:26 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
PackageArchitecture: all
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:Intel failed
Symptom_Card: Built-in Audio - HDA Intel
Symptom_DevicesInUse:
 1624 1624 smit F.... pulseaudio
 /dev/snd/controlC0: smit F.... pulseaudio
Symptom_Jack: Speaker, Internal
Symptom_Type: No sound at all
Title: [HP Pavilion dv6 Notebook PC, IDT 92HD75B3X5, Speaker, Internal] No sound at all
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/09/2009
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.36
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 3628
dmi.board.vendor: Quanta
dmi.board.version: 18.42
dmi.chassis.type: 10
dmi.chassis.vendor: Quanta
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.36:bd10/09/2009:svnHewlett-Packard:pnHPPaviliondv6NotebookPC:pvrRev1:rvnQuanta:rn3628:rvr18.42:cvnQuanta:ct10:cvrN/A:
dmi.product.name: HP Pavilion dv6 Notebook PC
dmi.product.version: Rev 1
dmi.sys.vendor: Hewlett-Packard