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SubjectRe: 2.4.10-pre15 -> final breaks IOAPIC on UP?
Alan Cox <> writes:

> > So, I believe that any IOAPIC related change between 2.4.10-pre15 and
> > 2.4.10-final breaks my X11 here.
> Uniprocessor IO-APIC only works for some machines. It also subtly changes
> IRQ delivery timing properties which may be worth checking too

All athlon motherboards with the via686 southbridge and an AMD northbridge
should fail according to the AMD errata. This may also happen with a via
northbridge. The AMD apic bus is subtely different from the intel apic
bus in implementation.

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