On the page : http://www.gentoo.org/doc/en/kde-config.xml Code Listing 2.5: Starting KDE mention that before issuing the command startx, the user has to run this command : emerge xdm /etc/init.d/xdm start and also this command : rc-update add xdm default for the next start of the machine. The problem is also for Gnome documentation page : http://www.gentoo.org/doc/en/gnome-config.xml Reproducible: Always
There's nothing wrong with using startx. Using xdm/kdm is explained later in the documents.