> Which configuration file would cause kdm to use a different server > than startx? > startx is not a server. it's a wrapper to xinit, which starts the server specified in /etc/X11/xinit/xserverrc. but that has _nothing_ to do with kdm. kdm's x-server config file is /etc/kde2/kdm/Xservers. possibly it's starting the X wrapper; in this case you would have to change the /etc/X11/X symlink (or just run "dpkg-reconfigure xserver-common").
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