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i have dell Inspiron n5110, core i5, my speakers were working fine after installing Ubuntu, somehow 3 days back it started crackling and now stopped working completely, my headphone is working properly. I'm new in Ubuntu.

I entered

pulseaudio

and this came:

E: [pulseaudio] pid.c: Daemon already running.
E: [pulseaudio] main.c: pa_pid_file_create() failed.

I also tried to test here it came:

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: alsa-base 1.0.25+dfsg-0ubuntu1.1
ProcVersionSignature: Ubuntu 3.5.0-36.57~precise1-generic 3.5.7.14
Uname: Linux 3.5.0-36-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.25.
ApportVersion: 2.0.1-0ubuntu17.3
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: PCH [HDA Intel PCH], device 0: STAC92xx Analog [STAC92xx Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: golinaz 2941 F.... pulseaudio
 /dev/snd/controlC0: golinaz 2941 F.... pulseaudio
 /dev/snd/pcmC0D0p: golinaz 2941 F...m pulseaudio
Card0.Amixer.info:
 Card hw:0 'PCH'/'HDA Intel PCH at 0xf7b00000 irq 54'
   Mixer name   : 'IDT 92HD87B1/3'
   Components   : 'HDA:111d76d1,102804b0,00100205'
   Controls : 18
   Simple ctrls : 10
Card1.Amixer.info:
 Card hw:1 'NVidia'/'HDA NVidia at 0xf6080000 irq 17'
   Mixer name   : 'Nvidia GPU 14 HDMI/DP'
   Components   : 'HDA:10de0014,10de0101,00100100'
   Controls : 24
   Simple ctrls : 4
Date: Sun Aug 11 18:46:27 2013
InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release amd64 (20130213)
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_Card: Built-in Audio - HDA Intel PCH
Symptom_Jack: Speaker, Internal
Symptom_Type: Sound works for a while, then breaks
Title: [Inspiron N5110, IDT 92HD87B1/3, Speaker, Internal] fails after a while
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/22/2012
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A10
dmi.board.name: 0FXK2Y
dmi.board.vendor: Dell Inc.
dmi.board.version: A10
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: Not Specified
dmi.modalias: dmi:bvnDellInc.:bvrA10:bd03/22/2012:svnDellInc.:pnInspironN5110:pvrNotSpecified:rvnDellInc.:rn0FXK2Y:rvrA10:cvnDellInc.:ct8:cvrNotSpecified:
dmi.product.name: Inspiron N5110
dmi.product.version: Not Specified
dmi.sys.vendor: Dell Inc.
mtime.conffile..etc.modprobe.d.alsa.base.conf: 2013-08-10T21:26:07.867028

help me please!

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