Re: lost interrupts with 2.4.21 and i875p chipset -- resolved (maybe)

From: Greg Norris (
Date: Sun Jun 15 2003 - 20:13:35 EST

On Tue, Jun 03, 2003 at 06:43:59PM -0500, Greg Norris wrote:
> > Does this occur if you build the kernel without ACPI and without APIC
> > support ?
> I just finished testing rc7, and sure enough the problem disappears
> after disabling APIC. Thanx!

I built a SMP kernel earlier today (in order to enable hyperthreading),
and discovered that the lost interrupt problem appears to have gone
away. In addition, dmesg no longer shows any "unexpected IO-APIC"
messages. The only configuration changes from the previous kernel are:


I guess that the next step is to disable hyperthreading in the BIOS,
and see if the UP kernel still has problems.
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