Jérémy Lal gave me a little tip here : https://bugzilla.kernel.org/show_bug.cgi?id=16541
Quote from his post : and Jeff, cheers up, i'm writing this from an iMac 27 (model 12,2), only i have to boot my linux partition from cd to enable bios instead of efi, then kms works. Could someone explain me exctly how to enable BIOS instead of EFI ? Maybe here is the solution ... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/542660 Title: New Apple iMac (Core i5) fails to display anything -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs