Re: [Linux-fbdev-devel] Virtual framebuffer driver - mmap problem

[Geert U. <ge...@li...>]

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 -- ge...@li...

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