PCI bridge missing

[Luke-Jr]

This applies to Debian sarge kernels kernel-image-2.4.27-2-686, 2.6.8-3-686, 
2.6.16-2-686, and 2.6.17-2-686...
I am trying to setup a Dell Optiplex GX1p system, which has a daughterboard 
PCI bridge for its PCI and ISA slots:
00:0f.0 PCI bridge: Digital Equipment Corporation DECchip 21152 (rev 03)

However, this bridge is completely ignored and unseen by Linux. It does not 
show up in lspci or dmesg (as far as I can tell) at all. The daughterboard is 
plugged in, and the PCI cards on it are powered.

How could I go about troubleshooting the problem? Has anyone experienced 
something like this before?

Thanks,

Luke-Jr

P.S. Please CC me if possible.
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