On 7 3, Gary D. Duzan wrote:
> 
>    I just upgraded my system (basically everything except the disks),
> compiled XFree86 3.3 from source, ran xf86config, and got this:
> 
> --
[snip]
> 
> Fatal server error:
> xf86MapVidMem: Address 0xffefc000 outside allowable range

  I just ran into this a couple of days ago--the server apparently needs
linear framebuffer access (as far as I can tell, this is not documented),
so you'll need either to use the aperture driver (which doesn't seem to be
included anywhere in the set of precompiled binaries--is it available with
the source?) or add "options INSECURE" to your kernel config and rebuild
the kernel.  The latter, of course, means you take the risks associated
with running with securelevel=-1.