The simple way to use KDE on ubuntu is to use Kubuntu.
Right now, 12.10 is available but, if we want to use root for desktop, we need to change different conf file than 10.04.
sudo sh -c 'echo "greeter-show-manual-login=true" /etc/lightdm/lightdm.conf'
Also we need to change the login screen setting from User Bar to Classic since User bar does not offer root user.
after these change, we can login root user desktop.
Additionary we would need these things:
sudo passwd root
You should have a file called kdmrc. In Debian, this file resides in /etc/kde4/kdm. Look for a 'AllowRootLogin=false' entry. Change it to 'AllowRootLogin=true'.
#Then
add or change the following entry:#AutoLoginEnable=true #AutoLoginUser=root
