Tried with Targus Compact USB keyboard and with quantal-desktop-amd64+mac 20120925 and it worked fine in the grub menu, i was able to select an earlier installed kernel to boot.
Tried with Targus Compact USB keyboard and with quantal- desktop- amd64+mac 20120925 and it worked fine in the grub menu, i was able to select an earlier installed kernel to boot.