Is there a command at the grub shell that would indicate if the machine is presenting EFI or BIOS firmware?
I'm using GRUB 2.00 on a 2010 Mac Pro. This computer has EFI firmware of course. But I have been trying for a couple of days to get it to boot Ubuntu in BIOS-emulation mode for want of NVIDIA display drivers. My understanding is that by the time GRUB is running, the decision to use EFI or BIOS emulation has already been made. So how can I check from GRUB?