[HCL ME LAPTOP, Conexant CX20585, Black Headphone Out, Right] No sound at all

[Rupa]

Not able to hear over headphone.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: alsa-base 1.0.25+dfsg-0ubuntu4
ProcVersionSignature: Ubuntu 3.13.0-85.129-generic 3.13.11-ckt36
Uname: Linux 3.13.0-85-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: rupa 2117 F.... pulseaudio
CurrentDesktop: Unity
Date: Sun May 8 23:37:27 2016
InstallationDate: Installed on 2015-10-04 (217 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH failed
Symptom_Card: Built-in Audio - HDA Intel PCH
Symptom_DevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: rupa 2117 F.... pulseaudio
Symptom_Jack: Black Headphone Out, Right
Symptom_Type: No sound at all
Title: [HCL ME LAPTOP, Conexant CX20585, Black Headphone Out, Right] No sound at all
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/08/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 300.DB1
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: HCL Infosystems Limited
dmi.board.vendor: HCL Infosystems Limited
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 9
dmi.chassis.vendor: HCL Infosystems Limited
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr300.DB1:bd02/08/2012:svnHCLInfosystemsLimited:pnHCLMELAPTOP:pvr1.0:rvnHCLInfosystemsLimited:rnHCLInfosystemsLimited:rvr1.0:cvnHCLInfosystemsLimited:ct9:cvr1.0:
dmi.product.name: HCL ME LAPTOP
dmi.product.version: 1.0
dmi.sys.vendor: HCL Infosystems Limited

[Rupa (rupa-chowrasia)]

Please help asap