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[serj <sj.sr@xxxxx>]

Solution: install syslinux instead grug2. Works fine without nosmp
option.

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https://bugs.launchpad.net/bugs/1197451

Title:
  Ubuntu fails to properly boot on Macbook Air 2013 6,1 & 6,2

Status in The Linux Kernel:
  Unknown
Status in “linux” package in Ubuntu:
  Fix Released
Status in “linux” source package in Precise:
  Triaged
Status in “linux” source package in Quantal:
  Triaged
Status in “linux” source package in Raring:
  Triaged
Status in “linux” source package in Saucy:
  Fix Released

Bug description:
  Ubuntu fails to properly boot on Macbook Air 2013 6,1

  Ubuntu fails to boot the 13.10 live image from usb without specifying
  acpi-off as a boot parameter.

  After installation is complete the boot process hangs at a purple
  screen. Booting into recovery mode shows that the process stops at the
  following:

  smpboot: Booting Node 0, #1

  I've tried 12.04.2, 13.04, and 13.10. I've also tried booting with
  kernel ver 3.9.8-030908-generic and the result is the same.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.10.0-2-generic 3.10.0-2.9
  ProcVersionSignature: Ubuntu 3.10.0-2.9-generic 3.10.0
  Uname: Linux 3.10.0-2-generic x86_64
  ApportVersion: 2.10.2-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  ubuntu     2885 F.... pulseaudio
   /dev/snd/controlC0:  ubuntu     2885 F.... pulseaudio
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  CasperVersion: 1.335
  Date: Wed Jul  3 15:31:42 2013
  IwConfig:
   eth0      no wireless extensions.
   
   lo        no wireless extensions.
  LiveMediaBuild: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64+mac (20130703)
  MachineType: Apple Inc. MacBookAir6,1
  MarkForUpload: True
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: initrd=/casper/initrd.lz file=/cdrom/preseed/username.seed boot=casper  quiet splash acpi=off BOOT_IMAGE=/casper/vmlinuz
  RelatedPackageVersions:
   linux-restricted-modules-3.10.0-2-generic N/A
   linux-backports-modules-3.10.0-2-generic  N/A
   linux-firmware                            1.110
  RfKill:
   0: hci0: Bluetooth
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 05/24/2013
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MBA61.88Z.0099.B00.1305241529
  dmi.board.asset.tag: Base Board Asset Tag#
  dmi.board.name: Mac-35C1E88140C3E6CF
  dmi.board.vendor: Apple Inc.
  dmi.board.version: MacBookAir6,1
  dmi.chassis.type: 10
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-35C1E88140C3E6CF
  dmi.modalias: dmi:bvnAppleInc.:bvrMBA61.88Z.0099.B00.1305241529:bd05/24/2013:svnAppleInc.:pnMacBookAir6,1:pvr1.0:rvnAppleInc.:rnMac-35C1E88140C3E6CF:rvrMacBookAir6,1:cvnAppleInc.:ct10:cvrMac-35C1E88140C3E6CF:
  dmi.product.name: MacBookAir6,1
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.

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