Re: [2.00] grub-install use on UEFI system?

[address@hidden]

2012/9/25 Chris Murphy <address@hidden>

On Sep 25, 2012, at 6:17 AM, address@hidden wrote:

With 1.99, i only had to use 'grub-install' (without any parameter, and not necessarily booted in EFI mode).
It would be nice (for retrocompatibility) if 2.00 could do the same (eg it could guess the 32/64 architecture, and set --efi-directory to /boot/efi by default).

It's not that simple. /boot/efi is just a mount point for the EFI System partition. grub.efi can't free float on that partition, it won't be found. It needs to go in /efi/grub or /efi/fedora or /efi/suse or whatever, per the UEFI spec. I think for upstream grub it probably would be <mountpoint>/efi/grub. And then each distribution can modify so their grub-install will place grub.efi in the distribution specific location on the EFI System partition.

Thanks Chris,

I agree that GRUB needs to know in which ESP's sub-folder (eg /efi/fedora) it needs to create the grub*.efi file, but then i wonder:

1) why does 'grub-install' (without any parameter) work for Ubuntu12.04 (grub1.99) ?
2) why does the command indicated by Aaron for 2.00 (grub-install --target=x86_64-efi --efi-directory="<root efi directory, eg. /boot/efi>") does not specify this sub-folder ?

Regards
Yann