No sound in Built in OS Ubuntu 12.04LTS in Inspiron 15

UBUNTU 12.04 LTS
Sound in front speakers
No sound heard at all

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: alsa-base 1.0.25+dfsg-0ubuntu1.1
ProcVersionSignature: Ubuntu 3.5.0-61.90-generic 3.5.7.33
Uname: Linux 3.5.0-61-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.25.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 1: PCH [HDA Intel PCH], device 0: HDA Generic [HDA Generic]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
ApportVersion: 2.0.1-0ubuntu17.13
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 1: PCH [HDA Intel PCH], device 0: HDA Generic [HDA Generic]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: diptendu 2032 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf7e14000 irq 60'
   Mixer name : 'Generic 0000 ID 0'
   Components : 'HDA:00000000,80860101,00100000'
   Controls : 0
   Simple ctrls : 0
Card0.Amixer.values:

Card1.Amixer.info:
 Card hw:1 'PCH'/'HDA Intel PCH at 0xf7e10000 irq 60'
   Mixer name : 'Realtek ID 255'
   Components : 'HDA:10ec0255,10280651,00100002'
   Controls : 4
   Simple ctrls : 3
Date: Wed Feb 17 18:44:29 2016
DistributionChannelDescriptor:
 # This is a distribution channel descriptor
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-somerville-precise-amd64-20130203-1
InstallationMedia: Ubuntu 12.04 "Precise" - Build amd64 LIVE Binary 20130203-13:50
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 failed
Symptom_Card: Built-in Audio - HDA Intel PCH
Symptom_Jack: Speaker, Internal
Symptom_Type: No sound at all
Title: [Inspiron 3542, Realtek ID 255, Speaker, Internal] No sound at all
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/16/2015
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A09
dmi.board.name: 0KHNVP
dmi.board.vendor: Dell Inc.
dmi.board.version: A09
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: Not Specified
dmi.modalias: dmi:bvnDellInc.:bvrA09:bd10/16/2015:svnDellInc.:pnInspiron3542:pvrNotSpecified:rvnDellInc.:rn0KHNVP:rvrA09:cvnDellInc.:ct8:cvrNotSpecified:
dmi.product.name: Inspiron 3542
dmi.product.version: Not Specified
dmi.sys.vendor: Dell Inc.