Subject: From: Date:

PCI and PCIE VGA coexistence ? Mark Gilmore Fri, 04 Nov 2005 08:32:51 -0800

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Hi all,
I was wondering if "anyone" (which usually means Ingo :-)) had a theory 
regarding this problem:
I am attempting to run Knoppix with both the onboard VGA and a PCI-EXPRESS 
VGA card.

When I setup the BIOS to use the onboard VGA as the primary, the PCIE card 
does not "appear" on the PCI bus (in /proc/pci (or scanpci).
And when I setup the BIOS to use the PCIE VGA as the primary, the onboard 
VGA does not appear
(though a 3rd PCI/VGA card *will* appear).

To state another way, a primary onboard VGA will make a secondary PCIE VGA 
"disappear",
and a primary PCIE VGA will make the onboard VGA disappear (but not a 3rd 
PCI VGA).

Any theories ?
Thanks !

Mark Gilmore
http://OmnipotenceSoftware.com 

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