When I use Ctrl+Alt+F1 to go to TTY, everything is fine. But when I use Ctrl+Alt+F7 to switch back, the GUI appears on the screen, and then everything is frozen. I will have to wait for something like 5 minutes until my computer gets back working. I have done nothing special in the TTY, and I am quite sure that my computer is idle during the frozen period. The problem is reproduced every time I switch from TTY to GUI. Does anyone has an idea what's the problem?
I am using openSUSE 13.1 x86-64 KDE.
Thanks in advance.