[HP Pavilion 15 Notebook PC, ATI R6xx HDMI, Digital Out, HDMI] No sound at all

[Anil]

unable to hear the audio

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 4.8.0-36.36~16.04.1-generic 4.8.11
Uname: Linux 4.8.0-36-generic i686
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: i386
CurrentDesktop: Unity
Date: Fri Aug 4 17:06:56 2017
InstallationDate: Installed on 2017-07-24 (11 days ago)
InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release i386 (20170215.2)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_IN:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_IN
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:HDMI failed
Symptom_Card: Built-in Audio - HDA ATI HDMI
Symptom_Jack: Digital Out, HDMI
Symptom_Type: No sound at all
Title: [HP Pavilion 15 Notebook PC, ATI R6xx HDMI, Digital Out, HDMI] No sound at all
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/13/2014
dmi.bios.vendor: Insyde
dmi.bios.version: F.16
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 216C
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 30.25
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnInsyde:bvrF.16:bd11/13/2014:svnHewlett-Packard:pnHPPavilion15NotebookPC:pvr0882100000305E00000610100:rvnHewlett-Packard:rn216C:rvr30.25:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.name: HP Pavilion 15 Notebook PC
dmi.product.version: 0882100000305E00000610100
dmi.sys.vendor: Hewlett-Packard