Ok, I just checked with other distributions and it seems that the efibootmgr bug is upstream. If there is a way to prevent efibootmgr execution, please tell me. For exemple ubiquity should be patched in some way. By the way, it should be reported in the release notes that, in order to boot ubuntu from EFI, you need to either install rEFIt or executing these commands from in osx:
$ sudo mount -t msdos /dev/disk0s1 /efi/ $ sudo bless --mount /efi --setBoot --file /efi/EFI/ubuntu/grubx64.efi -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774089 Title: Booting fails 3 times, works every fourth time after new install of Natty Narwhal amd64 on Macbook Pro -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
