====== XDMCP login remoto ======

  cp /usr/share/doc/gdm/examples/custom.conf /etc/gdm/


  # GDM configuration storage
  
  [xdmcp]
  Enable=true
  DisplaysPerHost=2
  
  [chooser]
  
  [security]
  
  [debug]


   /etc/init.d/gdm restart


   apt-get install remmina remmina-plugin-xdmcp


http://www.peppertop.com/blog/?p=690

http://www.informatica.escuelaedib.com/wp/2010/10/servidor-x11vnc-de-escritorios-remotos-disponible-en-el-arranque-de-ubuntu-maverick/