Hi again.
Installed xfce4, gave the box a reboot and logged into my shiny new xfce4 desktop manager and everything worked as expected.
So I guess its solved. But logging out from everything Im doing, and in to xfce4 desktop just to run leadwerks will get cumbersome...
Anyone got some good advice on how to get Leadwerks running on awesomewm? Problems like these are extremely rare, so I guess they are easily fixable?