Back here to see if there is any improvement... Sadly not !
I was going as slow as possible to keep my hardy's before switching to lucid
when this would be solved.
Now it's coming to dead line...
I just want to point out that if any lambda user may/can switch from one
version to the next one
Back here because even with Terminal Server Client, it doesn't work.
You need xnest package to enable xdmcp in protocol menu from Terminal Server
Client.
But the most frustrating is that it starts, works 30 sec to login and then
kicks you out (using a server that runs xdmcp fine with Hardy).