LightDM configuration file is found at /etc/lightdm/lightdm. conf.
Where are LightDM themes stored?
If you manage to find others around the Internet (they don’t appear in likely places like KDE-Look yet), you’ll need to copy them into folders beneath /usr/share/kde4/apps/lightdm-kde-greeter/themes/ (on an Kbuntu-based system).
How do I update my LightDM?
- Open a terminal with Ctrl + Alt + T if you are on the desktop and not in the recovery console.
- Type sudo apt-get install gdm , and then your password when prompted or run sudo dpkg-reconfigure gdm then sudo service lightdm stop, in case gdm is already installed.