Framebuffer not supporting all resolutions

[braghavendra]

Hi,

I have used FC3 and FC5 installations. By default, I donot get the framebuffer devices created. I had to build the kernel v2.6.16.22 with the options to include framebuffer. After installation and restart, I have to manually create the framebuffer devices (mknod /dev/fb0 c 29 0 and so on for 32 devices).

Even after this, I am not able to access the framebuffer device /dev/fb0. On these installations, I am able to change display resolutions to 1024x768 or more for 24bit and 32bit colors.

I tried to install FC2 with default kernel v2.6.5.x. This created the framebuffer devices (0..31) by default. But I was not able to access these devices. However, when I built the kernel v2.6.8.x and restarted, I was able to use the framebuffer device to read/write data.
The problem with FC2 installation is that the display resolution cannot be set for more than 800x600 (24bit color).
Here again I tried to rebuild with v2.6.16.22. There are a whole lot of incompatibilities like GNU libraries (gcc, gmake, etc) with the FC2 installation.

What might be the problem in having framebuffer working properly on a particular Fedora Core installation?
Do you think that it might be a graphics card problem? My card is i810 Intel graphics onboard graphics.

I appreciate if anybody can help me get framebuffer device working properly.
I am currently referring to HOWTOs given below:
http://www.tldp.org/HOWTO/Framebuffer-HOWTO-5.html
http://www.charmed.com/txt/framebuffer.txt
... and a couple of other links.

Thanks in advance,

Regards,
-raghav