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["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

** Tags removed: kernel-bug-exists-upstream
** Tags added: kernel-bug-exists-upstream-3.17-rc4

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https://bugs.launchpad.net/bugs/1355984

Title:
  Built in speakers do not work on iMac 14,2

Status in “alsa-driver” package in Ubuntu:
  New
Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  Xubuntu 14.04 on iMac 14,2 no sound from internal speakers. Loud and clear using OSX 10.9.4. Also tried installing Lubuntu (no sound at all) Linux Mint 16 & 17 and Ubuntu 13.04, 13.10 (same problem as Xubuntu).
  Have all PulseAudio utils installed, all devices are listed but only analogue volume meter shows outputs when playing but as above nothing from speakers.
  AlsaMixer shows S/PDIF (highlighted), SPDIF 1 & S/PDIF 2 not MM, set at 00 but cannot be adjusted.

  To get the headphones to work I upgraded to the daily ALSA snapshot
  found here: https://code.launchpad.net/~ubuntu-audio-
  dev/+archive/ubuntu/alsa-daily/+packages

  The output of alsa-info.sh is here: http://www.alsa-project.org/db/?f=08cf13552b70232c96fea9293fdd54066243d79a I have downloaded the HDA Analyzer tool but I can't seem to get the internal speakers to work correctly in any consistent way, although they do occasionally work correctly for a few seconds. I can consistently make sound come from the speakers if I chose VREF = 50 or 80 in Node[0x0d]pin but it sounds like I am using a much smaller lower quality speaker when I do that. Here is the text dump for that node configuration:
  Node 0x0d [Pin Complex] wcaps 0x41048b: Stereo Amp-In
    Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
    Amp-In vals: [0x00 0x00]
    Pincap 0x00001764: IN Detect Balance
      Vref caps: HIZ 50 GRD 80
    Pin Default 0x400000f0: [N/A] Line Out at Ext N/A
      Conn = Unknown, Color = Unknown
      DefAssociation = 0xf, Sequence = 0x0
    Unsolicited: tag=0x00, enabled=0
    Power: setting=D0, actual=D0
    Delay: 1 samples

  WORKAROUND for the headphones only: # echo "options snd-hda-intel
  model=imac27_122" >> /etc/modprobe.d/imac_local.conf followed by a
  reboot.

  ---
  ApportVersion: 2.14.1-0ubuntu3.3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  ladmin     1910 F.... pulseaudio
   /dev/snd/controlC0:  ladmin     1910 F.... pulseaudio
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 14.04
  InstallationDate: Installed on 2014-08-11 (1 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: Apple Inc. iMac14,2
  NonfreeKernelModules: wl
  Package: linux (not installed)
  ProcFB: 0 nouveaufb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-33-generic.efi.signed root=UUID=2f77d057-5c9c-42d8-b2c0-18507f43420e ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.13.0-33.58-generic 3.13.11.4
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-33-generic N/A
   linux-backports-modules-3.13.0-33-generic  N/A
   linux-firmware                             1.127.5
  Tags:  trusty trusty
  Uname: Linux 3.13.0-33-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 03/14/2014
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: IM142.88Z.0118.B02.1403141302
  dmi.board.asset.tag: Base Board Asset Tag#
  dmi.board.name: Mac-27ADBB7B4CEE8E61
  dmi.board.vendor: Apple Inc.
  dmi.board.version: iMac14,2
  dmi.chassis.type: 13
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-27ADBB7B4CEE8E61
  dmi.modalias: dmi:bvnAppleInc.:bvrIM142.88Z.0118.B02.1403141302:bd03/14/2014:svnAppleInc.:pniMac14,2:pvr1.0:rvnAppleInc.:rnMac-27ADBB7B4CEE8E61:rvriMac14,2:cvnAppleInc.:ct13:cvrMac-27ADBB7B4CEE8E61:
  dmi.product.name: iMac14,2
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.

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