Problem with changing login screen

Question

I tried several time to change my log in screen by using sudo dpkg-reconfigure lightdm. I choose lightdm from here. But my log in screen is unchanged and look like below.

How can I change this and back to my default unity log in screen??

Answer 1

If the command sudo dpkg-reconfigure lightdm not work, edit /etc/lightdm/lightdm.conf file with your favorite editor:

gksudo gedit /etc/lightdm/lightdm.conf

Make sure the greeter-session is the unity-greeter, then restart.

greeter-session=unity-greeter

If the problem continue then give a try to this command:

sudo apt-get -o Dpkg::Options::="--force-confnew" install --reinstall lightdm