Re: G550 bug ? (was Re: Independ multiple users on G550)

[Petr V. <VAN...@vc...>]

On  1 Dec 03 at 17:02, Svetoslav Slavtchev wrote:
> 
> is this a matroxfb bug ?

Maybe. But I'd say that you broke fbdev API matroxfb expects.

> > matroxfb: MTRR's turned on
> > matroxfb: 1024x768x16bpp (virtual: 1024x65536)
> > fbcon_startup: res:    1024x0-16

Like that you are somewhere truncating values to 16 bits?! Thus 65536 == 0
in your arithmetic... And as matroxfb's code does

if (var->yres_virtual > 32767)
   var->yres_virtual = 32767;

it is impossible for yres_virtual to ever become 65536... Besides that
for 1024x65536/16bpp you need 128MB of videoram, and G550 can have only
32MB. So you screwed something a lot. You should get

matroxfb: Matrox G550 detected
matroxfb: MTRR's turned on
matroxfb: 1024x768x16bpp (virtual: 1024x8190)
matroxfb: framebuffer at 0xDA000000, mapped to 0xe0810000, size 33554432
Console: switching to colour frame buffer device 128x48
fb0: MATROX frame buffer device

I'd say that if you want support from me, you should use my code...
I have no idea what you are doing in your tree, but you are apparently
doing wrong things...
                                                Petr Vandrovec