[newbie] breaking out of a gui

[Herman Christiani]

Hello All,
Using Mandrake 7.1 only for a short time, used Caldera and Corel before,
in either of them when xwindows hung Crtl, Alt and Backspace was all I needed
to go to a textconsole, I can't find a keycombination that does the same in
Mandrake, so a reboot is my only option here, am I missing something?
TIA,
Herman