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[Tommy_CZ <1197451@xxxxxxxxxxxxxxxxxx>]

Ok here is my experience with Ubuntu and Macbook Air 6,2.:

Booting live USB:
EFI: 12.04.2 -> without problems
EFI: 13.04 -> without problems
amd64+mac: 12.04.2 -> cannot boot nor recognise Ubuntu USB installer
amd64+mac: 13.04 -> cannot boot nor recognise -||-

with special patch mac_setup.sh from "howto install ubuntu on macbookAir
4,2" (I can provide details) -> booting without using efi is OK with
12.04.2 and 13.04, no difference if "+mac" version or not. (but keep in
mind this bypass and do not use EFI standard way)

Installation from live USB:
12.04.2 -> impossible (freezes when installing grub -> reboot is needed -> installation is not sucsessfull)
13.04 -> installation works

Booting installed Ubuntu:
12.04.2 -> impossible, because bug in installer (ubiquity?)
13.04 - without acpi=off option in grub -> freeze when booting as aforesaid
13.04 - with acpi=off option -> freeze when booting as aforesaid
13.04 - with nosmp option -> freeze while booting with initramfs shell (saying something about it could not find SSD with UUID)
13.04 - with nosmp option + with change of root=/dev/sdaX -> first boot usualy is without problems
                                                                                                              -> next boots hangs with SAME settings (only updated but SAME kernel) at "error: sparse file not allowed" (not serious nor related bug) or "Loading initial ramdisk" screen (depending on whether you installed efi or no-efi way).

Usage of vanilla - installed Ubuntu:
13.04 - with nosmp option + with change of root=/dev/sdaX -> strange color gamut (16bit depth?) + non working wireless.
-> suspend-to-RAM works without problems.

Wireless ( bcm4360 / 43a0 ):
13.04 - with nosmp option + with change of root=/dev/sdaX -> installation of bcmwl-kernel-source from proposed to saucy results in: A) wireless works and can see SSID of networks (2,4GHz + 5 GHz)
B) cannot keep connection for more than 3 or 4 seconds when is connected to wireless networks with wpa-psk or wpa 2.
C) wireless networks without security are OK.

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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:
  Triaged
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:
  Triaged

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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