Matthieu Herrb <matthieu@laas.fr> writes:

> [...] you need to (re)install the XFree86 aperture driver. 

That was it!  Thank you!  :-)

I've never needed it before, but somewhere between late December and
now, a change to the kernel has made it necessary to use the aperture
driver to make XF86_SVGA work with my Matrox graphics adapter.

-tih
-- 
Popularity is the hallmark of mediocrity.  --Niles Crane, "Frasier"