[TravelMate 4740, Realtek ALC272X, Speaker, Internal] No sound at all

sir
from last update i am facing this problem i.e. no sound while playing movie on media player . so all we do is close the app & restart it again. many times this solves the problem..

warm regards

mahendra thakur

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: alsa-base 1.0.25+dfsg-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-29.46-generic 3.2.24
Uname: Linux 3.2.0-29-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu12
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC272X Analog [ALC272X Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: mahendra 1839 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf0800000 irq 42'
   Mixer name : 'Intel IbexPeak HDMI'
   Components : 'HDA:10ec0272,10250417,00100001 HDA:80862804,80860101,00100000'
   Controls : 26
   Simple ctrls : 12
Date: Sun Aug 12 11:53:54 2012
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
PackageArchitecture: all
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_IN
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:Intel successful
Symptom_Card: Built-in Audio - HDA Intel
Symptom_DevicesInUse:
 1839 mahendra F.... pulseaudio
     PID ACCESS COMMAND
Symptom_Jack: Speaker, Internal
Symptom_PulsePlaybackTest: PulseAudio playback test successful
Symptom_Type: No sound at all
Title: [TravelMate 4740, Realtek ALC272X, Speaker, Internal] No sound at all
UpgradeStatus: Upgraded to precise on 2012-05-07 (96 days ago)
dmi.bios.date: 11/02/2010
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: V1.28
dmi.board.asset.tag: No Asset Tag
dmi.board.name: BA40_CP
dmi.board.vendor: Acer
dmi.board.version: V1.28
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V1.28
dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrV1.28:bd11/02/2010:svnAcer:pnTravelMate4740:pvrV1.28:rvnAcer:rnBA40_CP:rvrV1.28:cvnAcer:ct10:cvrV1.28:
dmi.product.name: TravelMate 4740
dmi.product.version: V1.28
dmi.sys.vendor: Acer