Ubuntu – How to configure lightdm to work with XDMCP


Does anyone have a set up to make XDMCP work with LightDM on 11.10. Using XDMCP+GDM was easy as pie, worked great. After the upgrade to 11.10 with the switch to LightDM I can't figure out how to get it to work. Where is the documentation that explains the custom lightdm.conf file?

Any help appreciated…

Best Answer

To enable the XDMCP server in LightDM edit /etc/lightdm/lightdm.conf and add the following section:


Then restart LightDM with sudo restart lightdm from a text console (logout from any graphical sessions first).

You can set the XDM-AUTHENTICATION-1 key by setting key=value (value is in the same format as is used in the X -cookie option). If the key is not set then no authentication is used.

You can change the UDP/IP port by setting port=1234.

All the available LightDM settings are shown in the example configuration in /usr/share/doc/lightdm/lightdm.conf.