Dear Debian Group! Perhaps you have any good idea to find out what the problem of my trouble is:
I bootet a diskless client via network and: from one machine, where the root-fs lies everything works fine: every user can log into the desired Xsession. Now the problem: I copied the same root-fs on a server machine : it only lies there! Then booting works correctly until the point where authorization was required, but when a user wants to login into his session no session occurs ! Only root can login into his X-Session! The only error-file I get lies in the user's Home-directory, called .xsession-errors. The system message is: xrdb: can't open display can't connect to the xserver