Since yesterday, my system won't get past the startup screen (the Ubuntu logo with the blinking red dots). I left it for over an hour and didn't get the login screen. It was working normally before that and I don't recall any changes (no new software installed, etc).
I can login through the terminal with ALT+F1 but I don't know what to do to get the graphic mode. The command
I'm running Ubuntu 12.10 64 bits (kernel 188.8.131.52) on a Core I5 with Intel motherboard. No video card or sound card.