spurrious interrupt problem

John Baldwin jhb at FreeBSD.org
Wed Sep 1 14:14:02 PDT 2004


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.

-- 
John Baldwin <jhb at FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org


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