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[Tom Ellis <tom.ellis@xxxxxxxxxxxxx>]

Thanks for the verification.

I think this was fixed by the same commit in linux-backports-modules to fix the internal microphone:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/605047
This update is scheduled to be evaluated for a stable release update.

The current supported workaround is to use this linux-backports-modules
package on the systems that are affected.

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https://bugs.launchpad.net/bugs/705292

Title:
  [Dell E6410] docking station line out not working

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Line-Out in the Dell E6410 Docking Station is not working.

  Test cases:
  - no connectors - internal speakers play - ok
  - laptop line-out - headphones connected play; internal speakers muted  - ok
  - docking station line-out - headphones dead silent; internal speakers muted - NOK
  - microphone - laptop connector - record when input device is Microphone 1 -ok
  - microphone - docking station connector - record when input device is 
  Microphone 2 - ok

  I thought that I need to change the output device to get the sound, but 
  apparently, output is only 'Analog Output' and 'Analog Headphones', 
  neither of which put sound to the docking station's line-out.

  I have also tried a different docking station, so this is not a docking 
  station problem.

  ProblemType: Bug
  DistroRelease: Ubuntu 10.04
  Package: pulseaudio 1:0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu14
  ProcVersionSignature: Ubuntu 2.6.32-27.49-generic-pae 2.6.32.26+drm33.12
  Uname: Linux 2.6.32-27-generic-pae i686
  AlsaVersion:
   Advanced Linux Sound Architecture Driver Version 1.0.23.
   Compiled on Jan 19 2011 for kernel 2.6.32-27-generic-pae (SMP).
  Architecture: i386
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  tokarbol   3014 F.... pulseaudio
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xf6960000 irq 37'
     Mixer name	: 'Intel IbexPeak HDMI'
     Components	: 'HDA:111d76d5,1028040a,00100104 HDA:80862804,80860101,00100000'
     Controls      : 19
     Simple ctrls  : 11
  Date: Thu Jan 20 08:32:46 2011
  InstallationMedia: Kaszanka 10.04.1 "Lucid Lynx" - Release i386 (20100903)
  ProcEnviron:
   LANG=en_US.utf8
   SHELL=/bin/bash
  SelectedCard: 0 Intel HDA-Intel - HDA Intel
  SourcePackage: pulseaudio
  Symptom: audio
  Title: [IDT 92HD81B1C5] PA test tone failed (alsa tone succeeded)
  dmi.bios.date: 08/10/2010
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A05
  dmi.board.name: 0667CC
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A01
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA05:bd08/10/2010:svnDellInc.:pnLatitudeE6410:pvr0001:rvnDellInc.:rn0667CC:rvrA01:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E6410
  dmi.product.version: 0001
  dmi.sys.vendor: Dell Inc.