Is there any further information I can provide to help?

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https://bugs.launchpad.net/bugs/1629428

Title:
  [2522AC1, Conexant CX20585, Black Mic, Right] Recording problem. Mic
  Unplugged however responds to internal mic

Status in alsa-driver package in Ubuntu:
  New

Bug description:
  The internal microphone on this T410 works.

  I have a splitter cable in order to use the combo audio jack with a
  dedicated external microphone. This setup works on a Windows7
  installation.

  When viewing the information in sound settings in xubuntu, I have

  Internal Microphone
  Microphone (Unplugged)
  Dock Microphone (Unplugged)

  The internal Microphone works as expected, gains controllable.

  When I select Microphone (Unplugged), with my external microphone
  connected, I don't appear to get an output. However, if I tap the
  screen, where the internal Mic is, the volume levels are off the
  chart. If I unplug the external microphone, the same result can be
  observed.

  It appears both 'Internal Mic', and 'Microphone (Unplugged)' are
  grabbing audio from the same source (The internal microphone), just
  applying a different gain to it.

  Best Wishes

  Xalek

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu5
  ProcVersionSignature: Ubuntu 4.4.0-38.57-generic 4.4.19
  Uname: Linux 4.4.0-38-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/pcmC0D0c:   xander     1205 F...m pulseaudio
   /dev/snd/pcmC0D0p:   xander     1205 F...m pulseaudio
   /dev/snd/controlC0:  xander     1205 F.... pulseaudio
  CurrentDesktop: XFCE
  Date: Fri Sep 30 20:07:14 2016
  InstallationDate: Installed on 2016-08-21 (40 days ago)
  InstallationMedia: Xubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 
(20160719)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaRecordingTest: ALSA recording test through plughw:MID failed
  Symptom_Card: Built-in Audio - HDA Intel MID
  Symptom_Jack: Black Mic, Right
  Symptom_Type: Only some of inputs are working
  Title: [2522AC1, Conexant CX20585, Black Mic, Right] Recording problem
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/14/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 6IET85WW (1.45 )
  dmi.board.name: 2522AC1
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: 
dmi:bvnLENOVO:bvr6IET85WW(1.45):bd02/14/2013:svnLENOVO:pn2522AC1:pvrThinkPadT410:rvnLENOVO:rn2522AC1:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2522AC1
  dmi.product.version: ThinkPad T410
  dmi.sys.vendor: LENOVO
  mtime.conffile..etc.modprobe.d.alsa-base.conf: 2016-09-30T13:48:19.621569

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