I'm running ubuntu 14.04 LTS and everything was working fine until yesterday. Now I cannot login, I have some crappy resolution (600x400?) and everytime I try to login (I am 100% sure I have the password right) it simply goes back to login screen. Logging in as guest (no password) does the same.
I cannot show the console: every time I press Ctrl+Alt+F1/F2/F3 the screen just goes black and reboots this computer.
I would appreciate ALL help, please! Thanks