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[TIP] How to manually add grub entry for Windows 8 EFI

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    [TIP] How to manually add grub entry for Windows 8 EFI

    Edit /etc/grub.d/40_custom with something like

    Code:
    menuentry "Windows 8" {
        set root='(hd1,gpt2)'
        chainloader /EFI/microsoft/BOOT/bootmgfw.efi
    }
    Where hd1 is your Windows 8 disk and gpt2 is the partition the EFI stuff is in on that disk.

    Run update-grub and reboot.
    --
    Intocabile

    #2
    Hello and thank you for the tip. I'm having troubles to make it work properly.

    My grub . cfg file has automatically generated entries that uses hd0, so I guess that is the hard drive I should point to (I only have one hard drive after all).
    The prefix that it uses for the partitions is "gpt", so if my EFI partition is sda2 I guess I should point to the partition "gpt2".

    I have made several trials using variations of those, if I point to hd1 instead of hd0 it tells me:

    error: hd1 cannot get C / H / S values.

    If I point to hd0 and gpt2 I get something different. I get:

    error: invalid signature.

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