framebuffer video mode problems
 

Hi !
I am facing a problem with Framebuffer .... i compiled my kernel with a framebuffer support .. and then run linux om my system .. it works fine and .... when i used fbset to view the video mode it is 640x480 at 8 bits width , and rgba 8 8 8 0... then i run one of my programe written in GTK+DIRECTFB it works fine.
Now problem is when i used the same with other system , same kernel ,same linux same programe... it didnt work. and on checking video mode it gives me 640x480 4 bits width , also it doesnt load vesa i loads intelfb ..
what could be the reason ... any hardware specific problem or ....what ... i am really frustratted.
Regards
Mundri

The other system, I think is running an Intel i810 video chipset which for some reason doesn't work quite right with the vesa module, which is the kind of framebuffer that almost all of these programs are written for, more or less.

The intel framebuffer module has different options then the vesa settings, you can take a look at them in the kernel documentation:

/usr/src/linux-2.6.10-rc1/Documentation/fb/intel810.txt

This is also assuming 2.6, evidently the card behaves much differently under 2.4

Cheers,

Finegan

thanks ..... but
 

Thanks ...

it worked with 2.6.2 .... actually i was using kernel 2.4 .... but it created on more problem.... it works fine with the other sytem .... but now problem starts with the first one ... it runs fine ... but wont display it correctly .... i can only see it as i am viewing some X-ray.... i know the problem is somewhere with kernel options ... but dont know exactly where... if u do guide me or any idea...

Regards
mundri

I'm a bit confused, the first system is running a different video card then the i810 and is running framebuffering under vesa? Correct? What's your vga= line? And kernel?

Cheers,

Finegan

yap, first system has intel i845 video card i think and run under vesa tried vga=301,305,... , first i was using kernel 2.4.28 and now i am usin 2.6.2.

regards
Mundri

i think i tarked the problem
1) we have "intel 830M/845G/852GM/855GM/865G display support" option in kernel 2.4.24
2) "intel i810" option in kernel 2.6.2

but dont have have both in the same ...
and this is the probem ...
At first it loads first one driver when i used with first machine .... but when tried on other it dont have driver for i810
Second it loads "intel i810..." driver but dont have drivers for "intel 830M/845GM..."

Thats the whole stroy ... now what do i do ?........
any ides ...suggestion

Regards
Mundri