problemas com shutdown

ubuntu/kubuntu

1. open /etc/X11/xorg.conf and add to Section "Device":
Option "UseInternalAGPGART" "no"

2. open /etc/kde3/kdm/kdmrc and uncomment/add this line:
TerminateServer=true

If you're using Gnome, you might want to instead do

2. open /etc/X11/gdm/gdm.conf and uncomment/add this line:
AlwaysRestartServer=true