Whnever the Xconfigurator is run and then X-windows is being run,if virtual consoles are tried to access then there is no more display and the whole system hangs up without no monitor output,the only way out is to reboot the computer.
What card?
The video card is that of Intel 810 chipset
Current release of XFree86 in Red Hat Linux 7.1 does not seem to have this sort of problem. Try upgrading if you still experience trouble.