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[Rachel Greenham <1301524@xxxxxxxxxxxxxxxxxx>]

I just installed rEFInd on a UEFI PC also running Ubuntu Trusty. (built
around Asus Z87I-PRO mobo).

rEFInd had no trouble booting the same kernel (3.13.0-21) that I
reported this problem for on the Mac. Entirely default configuration.
(The Mac's rEFInd has an almost entirely default configuration too -
just the line to enable scanning for linux kernels uncommented, which is
uncommented on Linux by default.)

So it looks like this may be Mac specific. Unfortunately (as it'll be
harder to test). But Mac specific *and* specific to that one kernel...

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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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