X.org 7.4 need Option "AllowEmptyInput" "off" in Section "ServerFlags". Otherwise mouse and keyboard will not working

http://forums.freebsd.org/showthread.php?t=4708

And some driver program, like nvidia, doesn't aware of that, yet. So after recompilation, mouse and keyboard are not working.... and need to update the config manually.

Good reasons, showing how easy to manual GUI under unix desktop - http://spin.atomicobject.com/2013/10/26/why-linux-desktop/

Allow you mstsc to unix - http://www.ubuntugeek.com/xrdp-remote-desktop-protocol-rdp-server.html