Greetings. The description in "5.7.3. Xfce" is incomplete, at least for installing with "pkg". You also need "pkg install xinit" and "pkg install Xorg", at least for FreeBSD 11. You also need dbus_enable="YES" in /etc/rc.conf, like for KDE. Also, to start, you need "startxfce4", not "startx". --Paul Hoffman