[uds-announce] Dual Boot Installation with Ubuntu

[Göran Gustafsson]

Yes, Apple doesn't fully follow the specs. I've read that they use a mix of version 1 and 2.

From my experience you can only boot if the file is named EFI/boot/bootx64.efi. Otherwise you can't see the option when holding down the option key at boot.


On 2012-10-30, at 17:56, Colin Watson <cjwatson at ubuntu.com> wrote:

> On Mon, Oct 29, 2012 at 06:24:26PM +0100, Göran Gustafsson wrote:
>> If you are trying to boot using grub2 and EFI (without using refit and
>> a hybrid mbr partition table) then you need to make sure you got a
>> file named EFI/boot/bootx64.efi on /dev/sda1. Ubuntu drops the ball on
>> this one.
> 
> Per the spec, /EFI/boot/bootx64.efi is only supposed to be required for
> booting from removable media.  For fixed disks, it is supposed to be
> sufficient to have /EFI/ubuntu/grubx64.efi plus an efibootmgr entry.
> 
> However, Macbooks are probably hopelessly non-compliant with the UEFI
> spec ...
> 
> -- 
> Colin Watson                                       [cjwatson at ubuntu.com]
> 
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