I'm havin' the same problem described above.
My distro is Mandrake 9.0 (installed last night).
When I was using the vesa drivers for my X windows everything worked(well, not exactly
I couldn't use the acceleration of my GeForce4 = couldn't play TUX )
I tried using my CRT monitor(usually I use an LCD) and it didn't work with it either.
oh and my proc/fb :
before restarting with the new drivers
0 VESA VGA
now, after restarting the PC the /proc/fb is just EMPTY :
-r--r--r-- 1 root root 0 Jan 25 17:46 fb
well that's it if you need more info just ask.