I figured out that I can switch to virtual console by pressing
Ctrl + Alt + F1.
The problem still remains... when I press that button combination - it turns off my monitor. The monitor itself says
NO SIGNAL. Why is that so and how to fix it?
P.S. My computer, at the moment, have all kind of problems with drivers. I need to execute
stop gdm, but I can't do it in
gnome-terminal, for example. I need virtual console.