There are some config flags for
pcibios(4) that can fix possible PCI configuration problems... another option is to disable pcibios and enable acpi for
acpiprt(4) support.
Note: A message was sent into @tech that may fix some systems,
http://marc.info/?t=121235482300003&r=1&w=2
If this doesn't work, try using GENERIC.MP, even on non-MP systems the introduction of
ioapic(4) may be beneficial.
Good luck & Take care.