You try to boot ubuntu, but it loads with a corrupted screen and you can’t see any options…
Chances are you are trying to run the gui on some hardware that isn’t working correctly. No need to fear.
If you are booting with grub, select the option to “Install Ubuntu” and press whatever key is designated to edit the command. In my case I typed “e”.
Once you see the edit screen, make sure you add the option “nomodeset” wherever you see:
more about it here: http://ubuntuforums.org/showthread.php?t=1613132
That’s it. Boot it and it should run.
NOTE: You will also need to set this permanantly in your boot config if you don’t want to see the fuzzy screen everytime…read the stuff at the link.