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[Nell Hardcastle <1520878@xxxxxxxxxxxxxxxxxx>]

I no longer have the hardware to test with, 4.4-rc3 is the most recent
version I tested.

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https://bugs.launchpad.net/bugs/1520878

Title:
  [MacBook8,1] Speakers are muted

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  There doesn't seem to be any way to unmute the laptop's speakers.
  Headphones work fine and I tried all of the available settings in
  alsamixer to see if any had an effect.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: linux-image-4.2.0-18-generic 4.2.0-18.22
  ProcVersionSignature: Ubuntu 4.2.0-18.22-generic 4.2.3
  Uname: Linux 4.2.0-18-generic x86_64
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/pcmC1D0c:   nell       1292 F...m pulseaudio
   /dev/snd/controlC1:  nell       1292 F.... pulseaudio
                        nell       1676 F.... alsamixer
   /dev/snd/controlC0:  nell       1292 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sat Nov 28 20:54:52 2015
  IwConfig:
   enx00249b07662f  no wireless extensions.
   
   lo        no wireless extensions.
  MachineType: Apple Inc. MacBook8,1
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-18-generic.efi.signed root=UUID=cda41380-82fb-4b7d-850e-c742811e2f45 ro
  RelatedPackageVersions:
   linux-restricted-modules-4.2.0-18-generic N/A
   linux-backports-modules-4.2.0-18-generic  N/A
   linux-firmware                            1.153
  RfKill:
   
  SourcePackage: linux
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/31/2015
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MB81.88Z.0164.B08.1507311433
  dmi.board.asset.tag: Base Board Asset Tag#
  dmi.board.name: Mac-BE0E8AC46FE800CC
  dmi.board.vendor: Apple Inc.
  dmi.board.version: MacBook8,1
  dmi.chassis.asset.tag: Chassis Board Asset Tag#
  dmi.chassis.type: 9
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-BE0E8AC46FE800CC
  dmi.modalias: dmi:bvnAppleInc.:bvrMB81.88Z.0164.B08.1507311433:bd07/31/2015:svnAppleInc.:pnMacBook8,1:pvr1.0:rvnAppleInc.:rnMac-BE0E8AC46FE800CC:rvrMacBook8,1:cvnAppleInc.:ct9:cvrMac-BE0E8AC46FE800CC:
  dmi.product.name: MacBook8,1
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.

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