PROBLEM: 
- new ASUS Nvidia card (GTX 750 TI);
- Ubuntu 14.04 LTS;
- no tty (ctrl+alt+F1);
- login loop (password input = black screen + return to login prompt);
- holding 'e' or 'shift' on boot = no change (return to login prompt);
- (+ limited internet access]).

QUESTION: How to access tty, terminal or desktop, plz?