alt+ctrl+f1 and other consoles not working??

[David Morgan]

FC4 has a bug that can cause this with certain hardware (eg, Intel 
82865G integrated graphics controllers). Please see bug reports at:

https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=161242

https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=160453

Replacing /usr/X11R6/lib/modules/libvgahw.a with a different version 
fixes it. As I recall the bug reports direct you to where you can 
download the "good" libvgahw.a. Alternatively, you can get a copy of it 
by anonymous ftp from sputnik.smc.edu, pub directory. Fixed a couple 
classrooms' worth of afflicted machines, hope it fixes yours.