Check the configuration of the USE variable:
edit /etc/make.conf and specify USE="qt kde -gnome -gtk".
Emerge KDE:
emerge --pretend kde
emerge -f kde
emerge kde
env-update && source /etc/profile
Specify the X session to be KDE: check the version of KDE
ls /etc/X11/Sessions/
and edit /etc/rc.conf and specify XSESSION="kde-n.n.n".
Test the KDE login manager:
kdm
and edit /etc/rc.conf and specify DISPLAYMANAGER=kdm.
Make it the X boot application
rc-update add xdm default
Reboot and enjoy.
After a KDE installation, the sound system might be off.
run alsamixer and modify the following controls:
Reboot and enjoy.