In message <D6BCD31319E@urt-stud.uni-trier.de> you wrote:

> I found out that in fact it was not xdm, but xsm which did not work! 
> Still the problem stays the same! If I replace the call for xsm in the 
> Xsession file in /usr/X11R6.1/lib/X11/xdm/ with a call for fvwm and an 
> xterm it works fine!

I've found xdm+xsm to work dependant on kernel version used, but so far 
xdm always works without xsm and an .xsession instead. 
The only problem I could see that login didn't work with an empty password
(I've just installed, OK ?), but xlock has the same problem.

Cheers,


-- 
Thomas Boroske