I just installed Kubuntu alongside Ubuntu 12.04, and it changed my login screen. I liked the Ubuntu one and would like to set it back to the default. How can i do that?
Run this command in the terminal-
sudo dpkg-reconfigure lightdm
You will get the following screen:
then enter on
OK and you will get a screen similar to this with listings as
scroll down the navigation to lightdm and press enter.
you will get the ubuntu login screen back.