Mageia linux does come with KDE by default, I always use a login on my setups, even Windows whenever I install it, but if I'm not mistaken, during installation, you should get the option to use a login or not.
I have given up on Ubuntu awhile ago, though it is a pretty good distro, IMHO, it is trying to become Linux of all Linux. I'm not sure why everybody think Ubuntu is Linux!
If you don't stand for something, you'll fall for anything! - Sly Stone