Multiheaded framebuffer

I read in your rather old howto that having two framebuffer devices, one 
for each video card, requires the second video card to be a Matrox model 
as well as changes to the kernel. Right now I have two ATI cards. Does 
this mean it's impossible for me to have /dev/fb0 and /dev/fb1 both 
working or have things progressed since then? I can get /dev/fb0 for my 
AGP card working just fine with uvesafb, but whenever I modprobe 
radeonfb, no /dev/fb1 appears. I was hoping it would just like modprobe 
radeon makes /dev/dri/card1 appear.

I heard the new radeon driver which requires recompiling the kernel, 
drm, xorg and mesa has kernel modesetting and could create a framebuffer 
for my secondary video card. I'm prepared to try this but does anyone 
know something easier? Also if I do have to end up getting a Matrox 
card, does the p690 support framebuffer and xorg with open source 
drivers? Thanks.

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