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[Eduardo Llaguno <eduardo@xxxxxxxxxxx>]

After executing: arecord -vv -D plughw:2 -c 1 | aplay -D plughw:2

this is the output:
arecord: main:722: aplay: main:722: audio open error: Device or resource busyaudio open error: Device or resource busy

I assumed it is pulsaudio and not alsa, when submited I think I erased
that line since Pulsaudio (with the choose option) shows too many
options and I have no clue.

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https://bugs.launchpad.net/bugs/1397029

Title:
  [USB-Audio - Plantronics C420, recording] Headphone Mic do not appear
  after connect

Status in alsa-driver package in Ubuntu:
  Incomplete

Bug description:
  When connecting external USB headphones, only headphones speakers
  appear as an option to output audio, but Microphone only appears
  internal.

  After executing "pulsaudio -k" microphone appears.

  Sometimes (could be unrelated) when external HDMI connector the audio
  HDMI output do not appear. I once solve it Suspending the laptop and
  bringing it back again, then the correct Audio Output options appear.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  Uname: Linux 3.16.0-031600-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.5
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Thu Nov 27 09:06:40 2014
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-05-31 (179 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaRecordingTest: ALSA recording test through plughw:C420 successful
  Symptom_Card: Plantronics C420 - Plantronics C420
  Symptom_PulseAudioRecordingTest: PulseAudio recording test through plughw:C420 failed
  Symptom_Type: Only some of inputs are working
  Title: [USB-Audio - Plantronics C420, recording] Recording problem
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/12/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A07
  dmi.board.name: 0845MX
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: A07
  dmi.modalias: dmi:bvnDellInc.:bvrA07:bd11/12/2013:svnDellInc.:pnInspiron5537:pvrA07:rvnDellInc.:rn0845MX:rvrA00:cvnDellInc.:ct8:cvrA07:
  dmi.product.name: Inspiron 5537
  dmi.product.version: A07
  dmi.sys.vendor: Dell Inc.

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