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["Kristof S." <ksa1@xxxxxx>]

Do you mean a physically connected microphone? I never used one with this Notebook... 
I did not find a command/script 'hda-jack-sense-test'...

When I connect ear phones  the connection is noticed by the desktop
environment, so it seems there is some jack detection at least for the
phones.

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https://bugs.launchpad.net/bugs/1316156

Title:
  speakers audio won't work - pavucontrol is switching continually
  between speakers and headphones

Status in alsa-driver package in Ubuntu:
  Confirmed

Bug description:
  The port is continually switching between Speakers and Heaphones and no audio is outputting from the speakers. I have tried various distributions and have found that this problems is NOT present in Ubuntu 11.04, 12.04, 13.04. I have not tried 11.10, or 12.10. But have found 13.10 and 14.04 to show this identical problem.
  My main concern is for the 14.04 LTS version I am currently using.

  - I tried regulating the audio from alsamixer -by disabling auto-mute in alsamixer i managed to stop it switching from one port to the other. Still, no audio from speakers (only a regular and low-volume BUMP comes out)
  - I tried modifying the /etc/modprobe.d/alsa-base.conf file. Since i could not find my pc (Packard Bell EasyNote MX45) in the alsa-configuration list, i have tried using only the audio boards main info as referral (Intel HDA AD1986A NM10/ICH7). Thus i have added to the alsa-base.conf the following and rebooted after trying each and every new line (added only once per try, not all of them together).
                    -options snd-hda-intel model=laptop
                    -options snd-hda-intel model=laptop-eapd
                    -options snd-hda-intel model=3stack     
                    -options snd-hda-intel model=generic

  - Also tried the position_fix quirking suggested on the ubuntu documentation pages
                   -options snd-hda-intel position_fix= 1 
                   -options snd-hda-intel position_fix= 2

  The audio outputted from the speakers kept being a regular BUMP and
  nothing more, regardless of the input.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: pulseaudio 1:4.0-0ubuntu11
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-generic i686
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  xubuntu    3690 F.... pulseaudio
  CasperVersion: 1.340
  Date: Mon May  5 13:48:40 2014
  LiveMediaBuild: Xubuntu 14.04 LTS "Trusty Tahr" - Release i386 (20140416.2)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=it_IT.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: pulseaudio
  Symptom: audio
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/11/2006
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: T12FvNC.203
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: EasyNote_MX45
  dmi.board.vendor: Packard Bell BV
  dmi.board.version: 1.0
  dmi.chassis.type: 10
  dmi.chassis.vendor: Packard Bell BV
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrT12FvNC.203:bd10/11/2006:svnPackardBellBV:pnEasyNote_MX45:pvrPB64H00206:rvnPackardBellBV:rnEasyNote_MX45:rvr1.0:cvnPackardBellBV:ct10:cvr:
  dmi.product.name: EasyNote_MX45
  dmi.product.version: PB64H00206
  dmi.sys.vendor: Packard Bell BV

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