machfb vs. XVR-100

Hi, recently upgraded my machine with a XVR-100 card, which uses
radeonfb. The system has an onboard machfb and I'm using a USB
keyboard and mouse.

I noticed the mouse and keyboard get assigned to wsdisplay0, which
is always machfb unless the driver is disabled in the kernel
configuration. So I can't use the keyboard until X is started, which
is... annoying.

Is there any way to get wscons to play nicely with the extra
framebuffer without recompiling the kernel? (I have no problem
recompiling the kernel, just always like to learn more.)