LightDM (Lightweight Display Manager) is a Display Manager for the X.org X server.

Key Features of LightDM:

  • Cross-desktop - supports different desktop technologies.
  • Supports different display technologies (X, Mir, ...).
  • Lightweight - low memory usage and fast performance.
  • Low code complexity
  • Supports remote login (incoming - XDMCP, VNC, outgoing - XDMCP, pluggable).
  • Easily themeable
  • Support for 3D
  • Guest sessions.

To know more about lightdm and about how it helps the Ubuntu login please refer to this answer.

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