Public bug reported:

I have no sound neither in headphones nor in internal speakers. HDMI
output works well.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: alsa-base 1.0.25+dfsg-0ubuntu4
Uname: Linux 3.14.4-031404-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  felix      1778 F.... pulseaudio
 /dev/snd/pcmC0D0c:   felix      1778 F...m pulseaudio
 /dev/snd/pcmC0D3p:   felix      1778 F...m pulseaudio
CurrentDesktop: Unity
Date: Tue Jun  3 00:15:09 2014
InstallationDate: Installed on 2014-05-26 (7 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:  felix      1778 F.... pulseaudio
 /dev/snd/pcmC0D0c:   felix      1778 F...m pulseaudio
 /dev/snd/pcmC0D3p:   felix      1778 F...m pulseaudio
Symptom_Jack: Black Headphone Out, Front
Symptom_Type: No sound at all
Title: [HP Pavilion dv7 Notebook PC, IDT 92HD81B1X5, Black Headphone Out, 
Front] No sound at all
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/05/2011
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.1B
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 165A
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 10.31
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias: 
dmi:bvnHewlett-Packard:bvrF.1B:bd10/05/2011:svnHewlett-Packard:pnHPPaviliondv7NotebookPC:pvr0595100000244710000020100:rvnHewlett-Packard:rn165A:rvr10.31:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.name: HP Pavilion dv7 Notebook PC
dmi.product.version: 0595100000244710000020100
dmi.sys.vendor: Hewlett-Packard
mtime.conffile..etc.modprobe.d.alsa.base.conf: 2014-06-03T00:13:48.738956

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


** Tags: amd64 apport-bug trusty

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https://bugs.launchpad.net/bugs/1325761

Title:
  [HP Pavilion dv7 Notebook PC, IDT 92HD81B1X5, Black Headphone Out,
  Front] No sound at all

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