i just started to try SDDM instead KDM on F21 and i can connect with VNC
but not login because it don't happen anything when press a key which is
not really impressing
[root@srv-rhsoft:~]$ cat /etc/X11/xorg.conf.d/02-vnc.conf
Section "Module"
Load "vnc"
EndSection
Section "Screen"
Identifier "Screen0"
Option "SecurityTypes" "VncAuth"
Option "passwordFile" "/.vnc/passwd"
EndSection