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Thread: boot problem UEFI windows 8 and ubuntu

  1. #1
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    Mar 2013
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    boot problem UEFI windows 8 and ubuntu

    i have a problem, i have follox this link https://help.ubuntu.com/community/UEFI to install ubuntu in my pc pré installed windows 8.
    Now i can run ubuntu, but impossible tu boot windows 8, please helllllllllllllllp meeeeeeeeeeeeeeeeeeeeee, this is the link after boot repair https://help.ubuntu.com/community/UEFI

  2. #2
    Join Date
    Mar 2013
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    Re: boot problem UEFI windows 8 and ubuntu

    sorry this is the report : http://paste.ubuntu.com/5650293/

  3. #3
    Join Date
    Jun 2009
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    Chicago Suburbs
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    Ubuntu 12.04 Precise Pangolin

    Re: boot problem UEFI windows 8 and ubuntu

    You have 3 efi partitions, you can only have one per drive as UEFI boots from efi partition.
    Use gparted and remove boot flag from sda6 & sda11.

    Are you using this entry in grub. Have you tried with secure boot on and with it off. Some computers only work with it on once Ubuntu is installed, Others work either way.

    menuentry "Windows UEFI bkpbootmgfw.efi" {
    search --fs-uuid --no-floppy --set=root CCF4-6432
    chainloader (${root})/EFI/Microsoft/Boot/bkpbootmgfw.efi
    }

    It looks like you tried to install wubi, which does not work on gpt partitioned drives.
    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.







  4. #4
    Join Date
    Sep 2005
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    Re: boot problem UEFI windows 8 and ubuntu

    Regarding Secure Boot, it won't boot Linux unless you have added UEFI key signatures. Also, kernel version 3.8 and above is required.
    http://blog.hansenpartnership.com/ca...i-secure-boot/
    So I note that https://help.ubuntu.com/community/UEFI states that support has started from 12.10 x64 and 12.04.2 x64 "but it is not fully reliable yet".

    I had to disable secure boot in order to boot and install Ubuntu, once I had re-enabled I got "Secure Boot forbids loading module"

    http://paste.ubuntu.com/5652258/ it would appear efivars module is not available on 13.04.
    Last edited by echo6; March 27th, 2013 at 02:49 PM.

  5. #5
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    Ubuntu 12.04 Precise Pangolin

    Re: boot problem UEFI windows 8 and ubuntu

    Ubuntu 12.10 & now 12.04.2 come with the Microsoft key. You can use those with secure boot. But some UEFI implementations work better than others. Some work, some give difficultly and some just about do not work. Often requires a combination of settings in UEFI, and sometimes secure boot on or off.

    @echo6
    You have Raring which is still in development. You should post only in that sub-forum. Your install also was in BIOS/MBR mode, but it looks like Boot-Repair changed to UEFI.
    Your link and requirement for new kernel and UEFI tools is to allow using your own key, not the Microsoft key that is a temporarily workaround.
    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.







  6. #6
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    Sep 2005
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    Re: boot problem UEFI windows 8 and ubuntu

    @oldfred, BIOS/MBR mode I guess whilst I was working around the BIOS options for booting. I've now installed 12.10 and it Secure Boot is indeed working, but I need a driver for wifi which is in the kernel proper from 3.8. From reading http://web.dodds.net/~vorlon/wiki/bl..._Ubuntu_12.10/ I should be ok with compiling my own kernels?
    Last edited by echo6; March 30th, 2013 at 01:37 PM.

  7. #7
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    Ubuntu 12.04 Precise Pangolin

    Re: boot problem UEFI windows 8 and ubuntu

    I have never compiled a kernel. But I do not understand why you need to for wifi? Those have always been separate and usually when you install it downloads driver. Some have to download special drivers. Better to post issues with wifi in a new thread with that and model chip in title.
    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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