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[Jim Cheesman <jdcheesman@xxxxxxxxx>]

Should also mention that plugging the headphones in is detected by the
OS: in the sound settings dialog the output changes from "Speakers/built
in audio" to "Headphones/built in audio" when I plug them in.

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https://bugs.launchpad.net/bugs/1450027

Title:
  [HP ProBook 6550b, IDT 92HD75B3X5, Green Headphone Out, Front]
  Playback problem  - audio works fine without headphones

Status in alsa-driver package in Ubuntu:
  Confirmed

Bug description:
  Audio works fine through built-in speakers, doesn't work with
  headphones plugged in. This is related to the 15.04 release, as they
  previously worked fine. I've tested with other headphones just in
  case!

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
  Uname: Linux 3.19.0-15-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/pcmC0D0p:   jim        1770 F...m pulseaudio
   /dev/snd/controlC0:  jim        1770 F.... pulseaudio
  CurrentDesktop: X-Cinnamon
  Date: Wed Apr 29 15:33:17 2015
  InstallationDate: Installed on 2014-03-23 (401 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaPlaybackTest: ALSA playback test through plughw:MID failed
  Symptom_Card: Built-in Audio - HDA Intel MID
  Symptom_Jack: Green Headphone Out, Front
  Symptom_Type: Only some of outputs are working
  Title: [HP ProBook 6550b, IDT 92HD75B3X5, Green Headphone Out, Front] Playback problem
  UpgradeStatus: Upgraded to vivid on 2015-04-28 (1 days ago)
  dmi.bios.date: 06/25/2010
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: 68CDE Ver. F.01
  dmi.board.name: 146D
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: KBC Version 73.11
  dmi.chassis.asset.tag: CNU0334019
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvr68CDEVer.F.01:bd06/25/2010:svnHewlett-Packard:pnHPProBook6550b:pvr:rvnHewlett-Packard:rn146D:rvrKBCVersion73.11:cvnHewlett-Packard:ct10:cvr:
  dmi.product.name: HP ProBook 6550b
  dmi.sys.vendor: Hewlett-Packard

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