Public bug reported:

bug is present in Ubuntu 12.04 and Xubuntu 12.04 and Lubuntu 12.04.1 64bit 
alsa-base 1.0.25+dfsg-0ubuntu1 on this machine (64 bit)
I except Ubuntu to automatically sense the presence of headphones and disable 
the speakers.  This is not the case, the speakers and headphones play 
simultaneously.  I must install gnome-alsamixer to manually set the jack sense. 
 Alsa should have this enabled as the default setting.  This seems as though it 
should be a very easy bug to fix, though.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: alsa-base 1.0.25+dfsg-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-32.51-generic 3.2.30
Uname: Linux 3.2.0-32-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu14
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  love       1330 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'nForce3'/'NVidia nForce3 with AD1981B at irq 21'
   Mixer name   : 'Analog Devices AD1981B'
   Components   : 'AC97a:41445374'
   Controls      : 33
   Simple ctrls  : 22
Date: Wed Nov 14 06:42:21 2012
InstallationMedia: Lubuntu 12.04 "Precise Pangolin" - Release amd64 (20120423)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_US:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/30/2004
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.11
dmi.board.name: 08A0
dmi.board.vendor: Compal
dmi.board.version: 32.22
dmi.chassis.type: 10
dmi.chassis.vendor: Compal
dmi.modalias: 
dmi:bvnHewlett-Packard:bvrF.11:bd04/30/2004:svnHewlett-Packard:pnPresarioR3200(PF153UA#ABA):pvrF.11:rvnCompal:rn08A0:rvr32.22:cvnCompal:ct10:cvr:
dmi.product.name: Presario R3200 (PF153UA#ABA)
dmi.product.version: F.11
dmi.sys.vendor: Hewlett-Packard

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


** Tags: amd64 apport-bug precise

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https://bugs.launchpad.net/bugs/1078704

Title:
  headphone jack sense not enabled

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