Virtual framebuffer driver - mmap problem

Hi,

I would like to use virtual framebuffer on a linux system which is
installed with R.H.9 to simulate my target display ( an embedded
device with 320*480 resolution).

I have booted the system with VFB enabled. I verified it by checking
the file /proc/fb

# more /proc/fb
0 Virtual FB
1 VESA VGA

Problem :

I have written a application which will mmap /dev/fb0 and fill it with
some RGB values. I run framebuffer based VNC server to see whatever I
have written. I always get a white image. Looks like mmap is mapped to
some other address and fbvnc server is reading from somewhere else.

Does the existing drivers/video/vfb.c code works ? or Do I need to
tweak it ?


Regards
Shivappa


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