Found /etc/X11/xorg.conf had the following in the "ServerFlags"
#Option "AutoAddDevices" "off"Changed to
Option "AutoAddDevices" "off"
Little things I learned, other might want to know...
#Option "AutoAddDevices" "off"Changed to
Option "AutoAddDevices" "off"
After installing kubuntu 8.04, the screen resolution was too low.
apt-get install nvidia-glx
nvidia-xconfig
restart X to solve the problem