Originally Posted by netllama
The xen kernel is not the default kernel that is normally installed on any of the FC6 installations I've performed in the past few weeks. Also you're the first person running FC6 to report this problem, and many others have run into unrelated problems with FC6. So, I'd assume that you need to explicitly install xen to get a xen kernel by default.
Well I usually install with everything and when doing so it does install it with the xen kernel (it surprised me because I didn't want it.) Also I found xen supervised kernel laggy for some reason so I chucked it. I would have done this even if it would have worked with the nVidia driver.