Xserver won\'t recognize PCI card

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Hell XF86 xpert and newbie lists

I have been chasing the solution to a problem for a few days now
and I wondering if anyone can help. I have two machines with
identical hardware except for the motherboards. Each has an ATI
Xpert 98 (PCI) card and Radeon 7500 (AGP) card. We are controlling
the PCI card with the Xserver and the AGP card with custom code.

This all works fine on one machine but not the other. Both
are running Redhat 7.2 and Kernel 2.4.14. We add an entry in
the XF86Config-4 file for the PCI card only and then must
re-enable the AGP card (since X disables it) through the PCI-config
space COMMAND register for our custom app. We give the bus, device
and function numbers explictly in the XF86Config-4 file on both
machines. 

But only the one machine is functioning as expected.
It appears that, in the machine which is unable to function as 
expected, there is a problem with the Xserver recognizing the PCI
card despite the fact we have told it where on the bus to find the 
card in the XF86Config-4 file. Also both cards are recognized by 
Linux as indicated in /proc/pci and both cards do function.

Any ideas why we are not able to get the Xserver to see our PCI
card on that one machine? Incidentally the machine that is having
trouble is one with a Supermicro P6SBA motherboard with 440BX chipset.



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