> ok, ld.so.conf has X-libraries in it. And when i try to start the server,
> screen just flashes and it falls back to the terminal. No error message is
> displayed. 

 This is the default behaviour of the X server, unless you give him
a (local or global) .xinitrc to eat.

 Try this for a test:

---- .xinitrc ----
exec xterm &
exec xclock &
twm
---- .xinitrc ----

 When you stop or leave twm, the session will be closed. 
Start X with "startx".

-- 
Markus Illenseer