After a rather painful install (see bug 13018, bug 13020), X 4.0 is functional. I can use startx to bring it up, and go about my business. Booting in run level 5 results in gdm looping. X comes up, and I can see the login window flash briefly before X shuts downs, and starts again. If I run gdmlogin manually, via xinit, gdmlogin immediately bombs out with some font-related assertion, which I think is what's happening here. Two attachments will follow.
Created attachment 720 [details] Log of gdm crashing with an assertion.
Created attachment 721 [details] My XF86Config file
*** This bug has been marked as a duplicate of 12980 ***