I had this problem, and setting the legacy option in the bios indeed solved the problem for me (Asrock 939Dual-SATA2 motherboard) - running 6.06.1 daily from 20060806.1
-- grub (installer too) doesn't work with apple usb-keyboard on a pc-system https://launchpad.net/bugs/36342 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
