Re: 2.4.10-pre15 -> final breaks IOAPIC on UP?

Eyal Lebedinsky (
Tue, 25 Sep 2001 00:22:34 +1000

Alan Cox wrote:
> > 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

I have an SMP machine (Epox D3VA, 2xPIII/933) which needs "noapic" boot
or it fails to read the "partition check" (lost interrupt). It is this
way since 2.4.8 and around 2.4.9-ac12 I checked and it had the same
problem. The problem is 100% reproducible.

I believe there are still some problems with apic even on SMP. Maybe
only on some mobos?

Eyal Lebedinsky ( <>
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