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[Bernard Helyer <b.helyer@xxxxxxxxx>]

Yeah, I've got a MacBook 5,2 too, and I can't make ALSA drive the
headphone jack at all. The hdajackretask rerouting to the line-in (then
plug the headphones in there) workaround that Tobias suggested is indeed
very hacky, but does work.

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https://bugs.launchpad.net/bugs/1343020

Title:
  Realtek ALC889A No sound output

Status in alsa-driver package in Ubuntu:
  New

Bug description:
  I checked whole Google for this problem and tried very many things to
  solve it. Alsamixer does recognise if I plug in the headphones and
  does automute the speaker-sound but there is no sound on the
  headphones. The speakers work well. I installed some extern drivers by
  Realtek but this crashed the whole sound and I did a fresh
  installation of Ubuntu 14.04. The only thing I changed now is alsa-
  base.conf, I added the recommended line "options snd-hda-intel
  model=mb5" for my Macbook.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.13.0-30.55-generic 3.13.11.2
  Uname: Linux 3.13.0-30-generic i686
  NonfreeKernelModules: wl
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  tobias     1922 F.... pulseaudio
                        tobias    14404 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Thu Jul 17 01:29:33 2014
  InstallationDate: Installed on 2014-07-16 (0 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release i386 (20140417)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaPlaybackTest: ALSA playback test through plughw:NVidia failed
  Symptom_Card: Internes Audio - HDA NVidia
  Symptom_DevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  tobias     1922 F.... pulseaudio
                        tobias    14404 F.... pulseaudio
  Symptom_Jack: Green Headphone Out, Rear
  Symptom_Type: No sound at all
  Title: [MacBook5,2, Realtek ALC889A, Green Headphone Out, Rear] No sound at all
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/16/09
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MB52.88Z.0088.B05.0904162222
  dmi.board.asset.tag: Base Board Asset Tag#
  dmi.board.name: Mac-F22788AA
  dmi.board.vendor: Apple Inc.
  dmi.chassis.asset.tag: Asset Tag#
  dmi.chassis.type: 10
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-F22788AA
  dmi.modalias: dmi:bvnAppleInc.:bvrMB52.88Z.0088.B05.0904162222:bd04/16/09:svnAppleInc.:pnMacBook5,2:pvr1.0:rvnAppleInc.:rnMac-F22788AA:rvr:cvnAppleInc.:ct10:cvrMac-F22788AA:
  dmi.product.name: MacBook5,2
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.
  mtime.conffile..etc.modprobe.d.alsa.base.conf: 2014-07-16T22:29:29.018786

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