I am using Fedora 11 and I configured the nVidia driver to set my 2 monitors as separate X screens and to enable Xinerama.

The problem is that now when I try to enable Desktop Effects, an error message appears, saying "The Composite extension is not available" (Maybe it has to have some special extension to work across multiple screens?).

I tried adding this to xorg.conf:

Section "Extensions"
    Option "Composite"

yum install compiz-composite
yum install compiz-composite-extension
Anyway, what is the problem and if I need to, how do I install this "Composite Extension"?