I've installed Ubuntu 4x on my laptop today (Toshiba Satellite A305-S6916). The install completes each time, no problem. It prompts me to remove my DVD, close the tray, and hit enter. I do so... the laptop restarts, loads bios, and goes to a completely black screen (non-interactive) with a blinking DOS cursor in the top left... that's it. Happened each of the 4x I tried installing today. Hitting keys/mouse doesn't do anything. If I restart, comes back to same blank screen. Thoughts?