Just installed Ubuntu on a second hard drive but during the installation I'm quite sure that I did not 'check' the screen resolution box but I just pressed enter instead. Ubuntu now trys to boot at some ridiculous resolution for my monitor and I get a fuzzy particle screen. I searched for a solution and apparently if I login to the terminal I can type 'sudo dpkg-reconfigure xserver-xorg' to redo part of the setup. I tried this but got an error message, is there a default terminal password? Anyone suggest any other solutions apart from a total reinstall?