X is called a server, Your machine was not trying to connect to a "SERVER", just the gui.
You probably need to configure xorg or X11, depending on what mandriva uses, its the file that configures your hardware, Monitor, graphics card, mouse...ETC.. Changing hostname wont do anything that I am aware of regarding X.
In the console goto /etc/X11 and see if there is a file called xorg.conf, if so try to run xorgconfig then go from there........
Last edited by BajaNick; 11-22-2005 at 11:25 PM.