AFAIR, to configure X only with the /etc/X11/xorg.conf file it is recommended to disable the "ServerFlags" option "AutoAddDevices" (see man xorg.conf and /usr/share/doc/xserver-xorg-core/changelog.gz). Otherwise the configuration shall be migrated to /usr/share/X11/xorg.conf.d/10-evdev.conf (see /usr/share/doc/xser-xorg-core/changelog.Debian.gz). -- Best regards, Jörg-Volker.