spurrious interrupt problem

Andrew Gallatin gallatin at cs.duke.edu
Wed Sep 1 17:33:21 PDT 2004

John Baldwin writes:
 > On Friday 27 August 2004 06:47 pm, Nate Lawson wrote:
 > > I don't see anything wrong with your acpi pci link routing.  In fact,
 > > all your irqs are hardwired meaning acpi shouldn't touch them.  This
 > > must be something with ioapic.  (BTW, acpi is non-optional on amd64).
 > Talk to phk at .  He had an opteron motherboard that had a busted BIOS that left 
 > the links between PCI IRQs that are used in atpic mode setup even when in 
 > apic mode so that you get 'alias' IRQs in apic mode.  In his case the vendor 
 > provided a BIOS update that fixed the issue.

I had our onsite guy update the bios, but that ended up disabling USB.
So its "fixed".. ;)


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