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[Le Gluon Du Net <legluondunet@xxxxxxx>]

Finally resolved in kernel 3.13, look here:
https://bugzilla.kernel.org/show_bug.cgi?id=65681

** Bug watch added: Linux Kernel Bug Tracker #65681
   http://bugzilla.kernel.org/show_bug.cgi?id=65681

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https://bugs.launchpad.net/bugs/1161863

Title:
  no sound macbook air 2.1

Status in “linux” package in Ubuntu:
  Expired

Bug description:
  Hello,

  I have no sound on my macbook air 2.1, thanks for your help.

  # lspci
  00:08.0 Audio device: NVIDIA Corporation MCP79 High Definition Audio (rev b1)

  # lshw -C sound
    *-multimedia NON-RÉCLAMÉ
         description: Audio device
         produit: MCP79 High Definition Audio
         fabriquant: NVIDIA Corporation
         identifiant matériel: 8
         information bus: pci@0000:00:08.0
         version: b1
         bits: 32 bits
         horloge: 66MHz
         fonctionnalités: pm cap_list
         configuration: latency=0 maxlatency=5 mingnt=2
         ressources: mémoire:93380000-93383fff

  # dmesg
  [ 1786.009932] hda_intel: Disabling MSI
  [ 1786.009970] snd_hda_intel 0000:00:08.0: setting latency timer to 64
  [ 1786.042057] hda-intel 0000:00:08.0: no codecs found!

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: linux-image-3.8.0-15-generic 3.8.0-15.25
  ProcVersionSignature: Ubuntu 3.8.0-15.25-generic 3.8.4
  Uname: Linux 3.8.0-15-generic x86_64
  NonfreeKernelModules: nvidia wl
  ApportVersion: 2.9.2-0ubuntu5
  Architecture: amd64
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  Date: Fri Mar 29 13:55:27 2013
  HibernationDevice: RESUME=UUID=726edf9a-821f-46eb-80e7-9ee1dd2d6f5e
  InstallationDate: Installed on 2013-02-26 (31 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130214)
  MachineType: Apple Inc. MacBookAir2,1
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=fr_FR.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-15-generic root=UUID=883b18c5-21fd-44b1-af9d-49fb2fdd33d4 ro acpi=off noapic nouveau.modeset=0 rdblacklist=nouveau
  RelatedPackageVersions:
   linux-restricted-modules-3.8.0-15-generic N/A
   linux-backports-modules-3.8.0-15-generic  N/A
   linux-firmware                            1.104
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/14/08
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MBA21.88Z.0075.B03.0811141325
  dmi.board.asset.tag: Base Board Asset Tag#
  dmi.board.name: Mac-F42D88C8
  dmi.board.vendor: Apple Inc.
  dmi.chassis.asset.tag: Asset Tag#
  dmi.chassis.type: 10
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-F42D88C8
  dmi.modalias: dmi:bvnAppleInc.:bvrMBA21.88Z.0075.B03.0811141325:bd11/14/08:svnAppleInc.:pnMacBookAir2,1:pvr1.0:rvnAppleInc.:rnMac-F42D88C8:rvr:cvnAppleInc.:ct10:cvrMac-F42D88C8:
  dmi.product.name: MacBookAir2,1
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.

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