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Thread: Cannot boot Windows 8.1 from Grub with Secure Boot enabled

  1. #1
    Join Date
    Oct 2013
    Beans
    5

    Cannot boot Windows 8.1 from Grub with Secure Boot enabled

    Hi

    I've got a Dell Inspiron 15R which I dual-boot with Ubuntu 13.10 and Windows 8.1. I used "Boot Repair" to sort out the dual booting, and it works fine without Secure Boot enabled - I can boot Windows or Ubuntu from the Grub2 menu.

    However, I would like to take advantage of Secure Boot, but when I enable it in the UEFI setup (after selecting the "SecureBoot" option in Boot Repair), I cannot boot Windows from the Grub2 menu. Ubuntu still boots OK.

    I _can_ boot Windows from the UEFI boot menu (accessed via the F12 key as the PC boots) with Secure Boot enabled, but I'd like to be able to boot either OS from the Grub2 menu.

    The message I get from Grub2 when I try to boot Windows with Secure Boot enabled is something like this:
    Code:
    /EndEntire
    file path: /ACPI(a0341d0,0)/PCI(2,1f)/UnknownMessaging(12)/HD(1,800,fa000,78cd082761b71840,9b,bd)/File(\EFI\Microsoft\Boot)/File(bootmgfw.efi)/EndEntire
    error: cannot load image
    I have run Boot Repar several times with different options to try to fix this, but without success. The URLs provided by Boot Repair are:

    http://paste.ubuntu.com/6271276/

    http://paste.ubuntu.com/6271482/

    I've read a few posts and discussions elsewhere but none seem to cover this case. I'm still struggling to get my head around UEFI and am wary about fiddling too much with the UEFI settings in the PC setup in case I render it completely unbootable, so any advice from someone who understands this better than me would be welcome.

    Regards

    Andy

  2. #2
    Join Date
    Mar 2011
    Beans
    476

    Re: Cannot boot Windows 8.1 from Grub with Secure Boot enabled

    This is bug 1091464. Please add yourself to the bug, and provide some details on your machine.

  3. #3
    Join Date
    Oct 2013
    Beans
    5

    Re: Cannot boot Windows 8.1 from Grub with Secure Boot enabled

    Thanks, ubfan1. Glad to know it's not just me being stupid. I've done as you suggested and added my details to the bug in question.

  4. #4
    Join Date
    Jun 2009
    Location
    Chicago Suburbs
    Beans
    Hidden!
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Cannot boot Windows 8.1 from Grub with Secure Boot enabled

    Post #11 in bug report also discusses use rEFInd.
    Somewhere in grub2's chainload a file that is not secure boot must exist.

    But secure boot is not all it is played up to be by Microsoft.
    http://www.zdnet.com/torvalds-clarif...on-7000011918/
    the whole UEFI thing is more about control than security
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







  5. #5
    Join Date
    Sep 2005
    Beans
    20

    Re: Cannot boot Windows 8.1 from Grub with Secure Boot enabled

    Hello i am having the same exact problem as well on a Dell XPS 13 with version 14.04 and windows 8.1. For now i have disabled secure boot and i am able to boot into both. Not sure if having bitlocker and home folder encrypted in ubuntu plays any factor to this, which i have. How can i submit my info towards a bug report? thanks.
    Last edited by brooklynzoo81; September 8th, 2014 at 06:58 PM.

  6. #6
    Join Date
    Jun 2009
    Location
    Chicago Suburbs
    Beans
    Hidden!
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Cannot boot Windows 8.1 from Grub with Secure Boot enabled

    @brooklynzoo81
    Clickable link to bug report. But your encryption may be something different also, but they should include that if possible.
    Unable to chainload Windows 8 with Secure Boot enabled Also post #11 on using refind
    https://bugs.launchpad.net/ubuntu/+s...2/+bug/1091464
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







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