I'm also having this same issue in my desktop PC with ElementaryOS Freya. Dell Vostro 3550 with Intel Graphic Card.
Using the trick Ctrl+Alt+F1 then Alt+F7 to avoid the problem.
I'm also having this same issue in my desktop PC with ElementaryOS Freya. Dell Vostro 3550 with Intel Graphic Card.
Using the trick Ctrl+Alt+F1 then Alt+F7 to avoid the problem.