Public bug reported:

Sound worked fine initially on install but canot get it to work on at
all now, even trying your troubleshooting guide

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: alsa-base 1.0.25+dfsg-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-25.40-generic 3.2.18
Uname: Linux 3.2.0-25-generic x86_64
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu8
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: HDA Generic [HDA Generic]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC1:  paul       1863 F.... pulseaudio
 /dev/snd/controlC0:  paul       1863 F.... pulseaudio
 /dev/snd/pcmC0D0p:   paul       1863 F...m pulseaudio
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf0a00000 irq 55'
   Mixer name   : 'Realtek ID 665'
   Components   : 'HDA:10ec0665,1028046e,00100003'
   Controls      : 5
   Simple ctrls  : 4
Card1.Amixer.info:
 Card hw:1 'NVidia'/'HDA NVidia at 0xcdefc000 irq 17'
   Mixer name   : 'Nvidia GPU 14 HDMI/DP'
   Components   : 'HDA:10de0014,10de0101,00100100'
   Controls      : 24
   Simple ctrls  : 4
Date: Thu Jun 21 00:15:58 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 
(20120425)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No 
PulseAudio daemon running, or not running as session daemon.
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:Intel failed
Symptom_Card: Built-in Audio - HDA Intel
Symptom_DevicesInUse:
 1863  1863  1863  paul      F.... pulseaudio
 /dev/snd/controlC0:  paul      F.... pulseaudio
 /dev/snd/pcmC0D0p:   paul      F...m pulseaudio
Symptom_Jack: Speaker, Internal
Symptom_Type: No sound at all
Title: [XPS L501X, Realtek ID 665, Speaker, Internal] No sound at all
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/26/2010
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A04
dmi.board.name: 00YWG2
dmi.board.vendor: Dell Inc.
dmi.board.version: A04
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: A04
dmi.modalias: 
dmi:bvnDellInc.:bvrA04:bd11/26/2010:svnDellInc.:pnXPSL501X:pvrA04:rvnDellInc.:rn00YWG2:rvrA04:cvnDellInc.:ct8:cvrA04:
dmi.product.name: XPS L501X
dmi.product.version: A04
dmi.sys.vendor: Dell Inc.
mtime.conffile..etc.modprobe.d.alsa.base.conf: 2012-06-20T22:52:23.725841

** Affects: alsa-driver (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug precise

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https://bugs.launchpad.net/bugs/1015829

Title:
  [XPS L501X, Realtek ID 665, Speaker, Internal] No sound at all

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