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[Raymond <1462977@xxxxxxxxxxxxxxxxxx>]

http://cgit.freedesktop.org/pulseaudio/pulseaudio/commit/src/modules/alsa/mixer/paths
/analog-output-
headphones.conf?id=aec811798cd883a454b9b5cd82c77831906bbd2d

the dirty workaound without recompiled driver is to remove volume=off in
[Element Speaker+LO] in headphones.conf


[Element Speaker+LO]
switch = off
-volume = off

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https://bugs.launchpad.net/bugs/1462977

Title:
  Thinkpad T440s - Sound muted when docked to docking station

Status in ALSA driver:
  Unknown
Status in alsa-driver package in Ubuntu:
  Incomplete

Bug description:
  Hi everyone,

  when I dock my Thinkpad T440s to my docking station, the sound channel
  for the speakers connected to the docking station audio jack are muted
  by default. If I run the following command after docking

  amixer --card 1 sset 'Speaker+LO' 100%

  the sound starts working. Unfortunatly I have to run this command
  every time I am docking the system to the docking station. Furthermore
  there is specific volume slider is not shown in the audio setttings of
  Unity. So this command could only be a temporary workaround... The
  internal speakers and the headphones jack of my laptop does not have
  these problems.

  It would be really nice if the audio output of the docking stations
  stays unmuted, when i connect the laptop to the docking station.

  Maybe this bug is related to
  https://bugzilla.redhat.com/show_bug.cgi?id=1101386, but the
  workaround proposed there does not work for me.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.19.0-18.18-generic 3.19.6
  Uname: Linux 3.19.0-18-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/pcmC1D0p:   fabian     2170 F...m pulseaudio
   /dev/snd/controlC1:  fabian     2170 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Mon Jun  8 12:50:20 2015
  InstallationDate: Installed on 2015-04-28 (40 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  JournalErrors: Error: command ['journalctl', '-b', '--priority', 'warning'] failed with exit code 1: No journal files were found.
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_Card: Internes Audio - HDA Intel PCH
  Symptom_PulseAudioLog:
   
  Symptom_Type: Volume slider, or mixer problems
  Title: [HDA-Intel - HDA Intel PCH, playback] volume slider problem
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/10/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: GJET67WW (2.17 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20AQS00600
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Defined
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrGJET67WW(2.17):bd12/10/2013:svnLENOVO:pn20AQS00600:pvrThinkPadT440s:rvnLENOVO:rn20AQS00600:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 20AQS00600
  dmi.product.version: ThinkPad T440s
  dmi.sys.vendor: LENOVO

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