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Thread: Grub entries after dual boot and boot repair

  1. #1
    Join Date
    Apr 2010
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    69
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    Ubuntu 12.10 Quantal Quetzal

    Grub entries after dual boot and boot repair

    Hello,
    I have succesfully installed Ubuntu 12.10 x64 in my new Asus laptop ( with Windows 8 preinstalled. After the boot I can't boot in Windows 8 and I run Boot Repair. Now I can boot in Windows 8 but there are many entries in my grub. I want to clear the unused grub entries with a safe way.

    My Grub entries:

    Ubuntu -> Boots ok!
    Windows 8 (loader) ---> Still gives error
    2 Entries for System/Windows Recovery -> I didn't tried them
    Windows UEFI bootmgfw.efi (/EFI/Microsoft/Boot/bootmgfw.efi) -> Boots Ok
    Windows Boot UEFI loader (/EFI/Boot/bootx64.efi) -> Boots Ok But Which of them I must keep and which I must delete?

    This is my Boot Repair Output:
    http://paste.ubuntu.com/1538249/

    Thanks in advance

  2. #2
    Join Date
    Jun 2009
    Location
    Chicago Suburbs
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    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Grub entries after dual boot and boot repair

    Boot-Repair added the correct efi chain load entries to 25_custom. Grub2's os-prober has a bug and all its entries will not currently work. You can turn off os-prober.

    Grub 2 Title Tweaks Thread -drs305
    http://ubuntuforums.org/showthread.php?t=1287602
    #In /etc/default/grub I added this line:
    gksudo gedit /etc/default/grub
    GRUB_DISABLE_OS_PROBER=true
    #or turn off executeable bit
    sudo chmod a-x /etc/grub.d/30_os-prober


    #Then

    sudo update-grub
    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.




  3. #3
    Join Date
    Apr 2010
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    69
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    Ubuntu 12.10 Quantal Quetzal

    Re: Grub entries after dual boot and boot repair

    Thanks for your reply. I have turned off and now I have Ubuntu and 2 Windows Entries. Why the grub detected 2 windows loaders?

    Windows UEFI bootmgfw.efi (/EFI/Microsoft/Boot/bootmgfw.efi) -> Boots Ok
    Windows Boot UEFI loader (/EFI/Boot/bootx64.efi) -> Boots Ok

    Are the same ?? (they have some differences in the files that point) And which of the two I must use to login?

  4. #4
    Join Date
    Jun 2009
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    Chicago Suburbs
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    Ubuntu 12.04 Precise Pangolin

    Re: Grub entries after dual boot and boot repair

    Not sure of exact differences.

    Both Windows & Ubuntu have bootx64.efi so I think that must be related to the UEFI shell? Just found reference that says this file is the UEFI shell.

    The Windows boot file in BIOS was bootmgr so the Windows efi boot file is bootmgfw.efi.

    I would keep both of those.
    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
    Apr 2010
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    Ubuntu 12.10 Quantal Quetzal

    Re: Grub entries after dual boot and boot repair

    Quote Originally Posted by oldfred View Post
    Not sure of exact differences.

    Both Windows & Ubuntu have bootx64.efi so I think that must be related to the UEFI shell? Just found reference that says this file is the UEFI shell.

    The Windows boot file in BIOS was bootmgr so the Windows efi boot file is bootmgfw.efi.

    I would keep both of those.
    Ok thanks both of them boot Windows 8 so I will keep them. Thanks again

  6. #6
    Join Date
    Jan 2008
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    France
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    Ubuntu Development Release

    Arrow Re: Grub entries after dual boot and boot repair

    Hello

    Quote Originally Posted by khaos1 View Post
    Windows UEFI bootmgfw.efi (/EFI/Microsoft/Boot/bootmgfw.efi) -> Boots Ok
    Windows Boot UEFI loader (/EFI/Boot/bootx64.efi) -> Boots Ok

    Are the same ??
    No difference. You can remove one in your /etc/grub.d/25_custom file if you want.

  7. #7
    Join Date
    Apr 2010
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    Re: Grub entries after dual boot and boot repair

    Quote Originally Posted by YannBuntu View Post
    Hello



    No difference. You can remove one in your /etc/grub.d/25_custom file if you want.
    Thank you

  8. #8
    Join Date
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    Re: Grub entries after dual boot and boot repair

    you're welcome if your problem is solved, please use the Thread Tools to mark it [SOLVED]

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