My question is: When I do a pxe boot of my Thin Clients it connects to the server via LTSP. But then I see a screen to enter the user name followed by the password. I know that I have to change the Session to "Ubuntu 2 D" to connect and it works every time. But I have to reset the Session every time I restart the thin Client

Please advise how to
make the Session setting permanent and make it resident on the Thin Client to eliminate the re-occurrence on every start up.

This whole system will be used in W Africa and the Server will be shut down when school closes - due to shortage of electricity.

Thanks for any help.