From: Andreas Beck <becka@rz.uni-duesseldorf.de>
  To  : GGI mailing list <ggi-develop@eskimo.com>
  Date: Fri, 14 May 1999 19:09:24 +0200

Re: Multiple ATI Video Cards

> MODE SEEMS TO HAVE CHANGED PROPERLY, BUT SCREEN IS STILL
> A RASTER OF GREEN VERTICAL LINES

Sounds like a problem with DAC setup or similar.

> The fault seems not to be associated with fb0, but rather with
> "framebuffer using card which is not in lowest pci video slot".
> Does this give anyone an idea of where the fault is?

Yes. It is the card not being initialized properly.

At bootup the BIOS selects one card (usually by slot number) to be the
primary display adaptor. Only this card gets its IO ports enabled and the
BIOS activated.

Now that you have the card not in the primary slot, it's BIOS does not run,
and thus its registers contain undefined values.

If you have proper documentation on the chipset on how to completely save
and restore the registers, you can just grab a good register dump from
a card that is active and then dump it into the inactive one.

CU, Andy

-- 
= Andreas Beck                    |  Email :  <andreas.beck@ggi-project.org> =