Xfree86 drivers versus kernel drivers

Hi,
I am having some difficulty understanding the fundamental 
differences between xfree86 drivers and linux kernel drivers. Is 
there a good reference somewhere?

I have read that xfree86 drivers are really user space programs 
that map the graphic video memory and then access it. If so does 
xfree86 needs anything at all from the linux kernel stuff that is 
in ./drivers/video ? Or is that stuff just needed by linux so 
that it can print out boot messages before X starts?
Thanks a lot,
-jf simon

	

	
		
___________________________________________________________________________ 
Découvrez un nouveau moyen de poser toutes vos questions quelque soit le sujet ! 
Yahoo! Questions/Réponses pour partager vos connaissances, vos opinions et vos expériences. 
http://fr.answers.yahoo.com