LightDM is a cross-desktop display manager. A display manager is a daemon that:

• Runs display servers (e.g. X) where necessary.
• Runs greeters to allow users to pick which user account and session type to use.
• Allows greeters to perform authentication using PAM.
• Runs session processes once authentication is complete.
• Provides remote graphical login options.

Key features of LightDM are:

• Cross-desktop - supports different desktop technologies.
• Supports different display technologies (X, Mir, Wayland ...).
• Lightweight - low memory usage and fast performance.
• Guest sessions.
• Supports remote login (incoming - XDMCP, VNC, outgoing - XDMCP, pluggable).
• Comprehensive test suite.