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[Rachel Greenham <1301524@xxxxxxxxxxxxxxxxxx>]

Tested both. *Both* of them boot fine.

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https://bugs.launchpad.net/bugs/1301524

Title:
  Missing EFI Stub Loader support in 3.13.0-21?

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  I think that might be the problem: Installed on a Mac (Macbook Air
  4,1) using rEFInd boot manager, 3.13.0-19 and 3.13.0-20 as well as
  3.14 (mainline, installed to test something else) all happily booted
  directly using the stubloader. But 3.13.0-21 just hangs instantly on
  load.

  Googling around found an older Arch thread where apparently something
  similar happened to a 3.7 kernel build and that was what it turned out
  to be: https://bbs.archlinux.org/viewtopic.php?id=156670&p=1

  so guessing it might just be a build or build-script error?

  Kernel boots fine via grub (though this takes longer).

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-generic 3.13.0.21.25
  ProcVersionSignature: Ubuntu 3.13.0-21.43-generic 3.13.8
  Uname: Linux 3.13.0-21-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.14-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  rachel     1869 F.... pulseaudio
  CRDA:
   country EU:
   	(2402 - 2482 @ 40), (N/A, 20)
   	(5170 - 5250 @ 40), (N/A, 20)
   	(5250 - 5330 @ 40), (N/A, 20), DFS
   	(5490 - 5710 @ 40), (N/A, 27), DFS
  CurrentDesktop: Unity
  Date: Wed Apr  2 18:36:49 2014
  InstallationDate: Installed on 2014-03-28 (4 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Beta amd64+mac (20140326)
  MachineType: Apple Inc. MacBookAir4,1
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-21-generic root=UUID=c2167b45-d81a-4d7f-9017-36858344eef8 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-21-generic N/A
   linux-backports-modules-3.13.0-21-generic  N/A
   linux-firmware                             1.127
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/24/2012
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MBA41.88Z.0077.B0F.1201241549
  dmi.board.asset.tag: Base Board Asset Tag#
  dmi.board.name: Mac-C08A6BB70A942AC2
  dmi.board.vendor: Apple Inc.
  dmi.board.version: MacBookAir4,1
  dmi.chassis.type: 10
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-C08A6BB70A942AC2
  dmi.modalias: dmi:bvnAppleInc.:bvrMBA41.88Z.0077.B0F.1201241549:bd01/24/2012:svnAppleInc.:pnMacBookAir4,1:pvr1.0:rvnAppleInc.:rnMac-C08A6BB70A942AC2:rvrMacBookAir4,1:cvnAppleInc.:ct10:cvrMac-C08A6BB70A942AC2:
  dmi.product.name: MacBookAir4,1
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.

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