From: Shivappa Kushtagi <kushtagi@gmail.com>
To: linux-fbdev-devel@lists.sourceforge.net
Subject: Virtual framebuffer driver - mmap problem
Date: Wed, 8 Sep 2004 17:04:15 +0530 [thread overview]
Message-ID: <77e82a3f0409080434722d7650@mail.gmail.com> (raw)
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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next reply other threads:[~2004-09-08 11:34 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-08 11:34 Shivappa Kushtagi [this message]
2004-09-08 12:07 ` Virtual framebuffer driver - mmap problem Geert Uytterhoeven
-- strict thread matches above, loose matches on Subject: below --
2004-09-08 13:51 Shivappa Kushtagi
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