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[Tim Gardner <tim.gardner@xxxxxxxxxxxxx>]

** Changed in: linux (Ubuntu Saucy)
       Status: In Progress => Fix Committed

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https://bugs.launchpad.net/bugs/1200570

Title:
  Kernel panic on boot inside efivars_sysfs_init on MacBookPro8,1

Status in “linux” package in Ubuntu:
  Fix Committed
Status in “linux” source package in Saucy:
  Fix Committed

Bug description:
  I'm not able to boot with any recent saucy kernel without patch
  applied:

  --- drivers/firmware/efi/efivars.c.orig	2013-07-12 14:17:23.984697546 +0400
  +++ drivers/firmware/efi/efivars.c	2013-07-12 14:18:16.192698944 +0400
  @@ -583,6 +583,9 @@ int efivars_sysfs_init(void)
   	struct kobject *parent_kobj = efivars_kobject();
   	int error = 0;
   
  +        if (!efi_enabled(EFI_RUNTIME_SERVICES))
  +                return -ENODEV;
  +
   	/* No efivars has been registered yet */
   	if (!parent_kobj)
   		return 0;

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.10.0-2-generic 3.10.0-2.10
  ProcVersionSignature: Ubuntu 3.10.0-2.10-generic 3.10.0
  Uname: Linux 3.10.0-2-generic i686
  NonfreeKernelModules: wl
  ApportVersion: 2.10.2-0ubuntu4
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ihanick   26732 F.... pulseaudio
   /dev/snd/pcmC0D0c:   ihanick   26732 F...m pulseaudio
   /dev/snd/pcmC0D0p:   ihanick   26732 F...m pulseaudio
   /dev/snd/timer:      ihanick   26732 f.... pulseaudio
  CurrentDmesg: [   38.467672] ip6_tables: (C) 2000-2006 Netfilter Core Team
  Date: Fri Jul 12 13:44:25 2013
  HibernationDevice: RESUME=UUID=c6ee8164-6427-4804-a2cc-0deb8c289254
  MachineType: Apple Inc. MacBookPro8,1
  MarkForUpload: True
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.10.0-2-generic root=UUID=c5cbe32b-b343-4ed4-a961-2dd4dee6e6f6 ro quiet splash i915.i915_enable_rc6=15 i915.i915_enable_fbc=1 i915.lvds_downclock=1 pcie_aspm=force acpi_pme=native drm.vblankoffdelay=1 vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.10.0-2-generic N/A
   linux-backports-modules-3.10.0-2-generic  N/A
   linux-firmware                            1.111
  SourcePackage: linux
  UpgradeStatus: Upgraded to saucy on 2013-07-09 (2 days ago)
  dmi.bios.date: 01/24/12
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MBP81.88Z.0047.B27.1201241646
  dmi.board.asset.tag: Base Board Asset Tag#
  dmi.board.name: Mac-94245B3640C91C81
  dmi.board.vendor: Apple Inc.
  dmi.board.version: MacBookPro8,1
  dmi.chassis.type: 10
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-94245B3640C91C81
  dmi.modalias: dmi:bvnAppleInc.:bvrMBP81.88Z.0047.B27.1201241646:bd01/24/12:svnAppleInc.:pnMacBookPro8,1:pvr1.0:rvnAppleInc.:rnMac-94245B3640C91C81:rvrMacBookPro8,1:cvnAppleInc.:ct10:cvrMac-94245B3640C91C81:
  dmi.product.name: MacBookPro8,1
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.

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