Hi again, the fist mail got a bit screwed up, so here again: Hi, I am logging in to remote hosts via ssh -X then i sux to root and i can start gui applications a root. but if i then as root su -l to another user, i cannot start a gui application. su - toootheruser from an ordinary user to another works, but not doing this from root. Xlib: connection to ":0.0" refused by server Xlib: No protocol specified kded: cannot connect to X server :0.0 kded: ERROR: KUniqueApplication: Registering failed! kded: ERROR: Communication problem with kded, it probably crashed. Xlib: connection to ":0.0" refused by server Xlib: No protocol specified kdeinit: Can't connect to the X Server. kdeinit: Might not terminate at end of session. Xlib: connection to ":0.0" refused by server Xlib: No protocol specified kmail: cannot connect to X server :0.0 DCOP aborting call from 'anonymous-9067' to 'kmail' ERROR: Communication problem with kmail, it probably crashed. everything works fine when i su from an ordinary user to another ordinary use and start a gui application. but when i su to root, the DISPLAY variable stays set, but when i then su to another user, the DISPLAY variable went gone. and when i, now as the other ordinary user, try to start a gui appliccation i get the error i mentioned earlier (after setting the DISPLAY variable). any hint whats going wrong here or what can i do to find out myself whats wrong? i am using kde 3.4.1 rpm for suse and suse 9.3. kind regards sebastian -- Sebastian Reitenbach Tel.: ++49-(0)3381-8904-305 RapidEye AG Fax: ++49-(0)3381-8904-101 Friedrich-Franz-Str. 19 e-mail:reitenbach@xxxxxxxxxxx D-14770 Brandenburg web:http://www.rapideye.de We are currently looking for Software developers, System Engineers and others to join our team: http://www.rapideye.de/Join/join_frames_aussen.htm ___________________________________________________ . Account management: https://mail.kde.org/mailman/listinfo/kde. Archives: http://lists.kde.org/. More info: http://www.kde.org/faq.html.