[From Ask Ubuntu <http://askubuntu.com/questions/77872/keyboard-mouse-doesnt-work-on-mac-mini>]
The USB keyboard and mouse worked fine during installation, and works fine until and including the Grub menu, but in the login screen (or recovery menu) it doesn't work at all. I've followed recent instructions <http://dustin.li/2011/05/how-to-install-ubuntu-11-04-on-a-mac-mini/> for installing 11.04, and I'm booting with one of these Grub settings (normal and recovery boot, respectively):
linux /boot/vmlinuz-2.6.38-12-generic root=/dev/sda2 ro nomodeset xforcevesa quiet splash vt.handoff=7
linux /boot/vmlinuz-2.6.38-12-generic root=/dev/sda2 ro nomodeset xforcevesa single
Tried to install without a separate /var partition to see if that works. Looks like others <http://ubuntuforums.org/showthread.php?t=1423305#9> have fixed the ureadahead issue this way, but it made no difference.
Manually collected the latest logs.