When you have eliminated the impossible, whatever remains, however improbable, must be the truth !!
Mark it [SOLVED] if the issue has been resolved
I first managed to solve my problem with a "dirty fix". i created the users home directory manually, now i was able to log in with my ldapusers.
So the problem was inside /etc/pam.d/common-session
To automatically create home diretorys at login add this line.
All fixed!Code:session required pam_mkhomedir.so skel=/etc/skel umask=0022