Enable "Other User" Option For The Login Manager In Ubuntu 12.04

Enable "Other User" Option For The Login Manager In Ubuntu 12.04
1. Login as a normal user which you have created during Installation.
2. Edit the /etc/lightdm/lightdm.conf file

3. First of all Please take backup of original file 

         # cp -p /etc/lightdm/lightdm.conf /etc/lightdm/lightdm.conf.orig
4. Execute Following command :-

#/usr/lib/lightdm/lightdm-set-defaults -m true

       #/etc/init.d/lightdm restart

                           OR

4. Edit the /etc/lightdm/lightdm.conf file

         # vi /etc/lightdm/lightdm.conf

Now Please enter following line to [SeatDefaults] Selection:-
        greeter-show-manual-login=true