Running FC3, I can login remotely with XDMCP fine but I can only do so if I start "gdm" on the remote machine which then always starts X.
I don't know why I have to do this, also got an FC4 box and there I don't need to do so.
Even if I boot in init 5 while running KDE I still need to start gdm before I can connect remotely.
Then it tries to start a second dispaly and complains about a display already running.
Any clues on how to resolve this?