Non LTSP clients cannot connect to ubuntu 8.04 LTSP server

[Kai Wollweber]

Hello,

some of our clients (vxl-itona) have necessarily a local Linux OS (Gio-Linux) 
on flash ram. They are able to connect to an opensuse 10.3 server with kde 
via xdmcp. On the server side xdm was used as display manager.

The new server is ubuntu 8.04 which is configured as LTSP-Server. Clients 
booting the chroot image from this server are ok.

In order to allow xdmcp connections I configured the ubuntu server with the 
graphical gdmsetup as described in the edubuntu handbook [1]. I can ping the 
client from the server. When I try to connect to the server the terminal 
shows a black screen with cursor. If I switch to the terminal's control panel 
it shows "connection active".

Are there any steps left out in [1] which are to be customized in order to get 
a login screen?

One assumption why it doesn't work is that the terminals cannot connect to gdm 
(as we formerly connected to xdm). Can I substitute gdm by xdm on the ubuntu 
box without loosing the LTSP clients which connect via ldm?

TIA
Kai
 
[1] 
http://doc.ubuntu.com/edubuntu/edubuntu/handbook/C/customizing-thin-client.html


-- 
Kai Wollweber
Integrierte Gesamtschule
Eckernförde