Re: Virtual framebuffer driver - mmap problem

On Wed, 8 Sep 2004, Shivappa Kushtagi wrote:

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).

The virtual framebuffer is intended for testing _the kernel_ only.

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 ?

You cannot mmap() the video memory of vfb.

Why don't you use vesafb?

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds


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