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SubjectRe: [ACPI] IO-APIC on MS-6163 (2.4.23). ACPI?
Ryan Underwood writes:
>
> Attached dmesg and interrupts with acpi=off. Also attached kernel
> config.
>
> As you see, it acknowledges a local APIC but mentions nothing about
> IO-APIC. So I guess this isn't ACPI issue after all. But, I wonder why
> the IO-APIC isn't being used on this board anymore. There was a
> blacklist entry for it, but it was removed after it was discovered to be
> in error.

Your dmesg log doesn't mention any MP-table. With neither ACPI MADT
nor an MP-table the kernel has no way of knowing about any I/O-APIC.

You do have UP_IOAPIC enabled, so the kernel should look for it.
Please check your BIOS settings, and try with no ACPI at all in the kernel
(just to verify that acpi=off doesn't prevent MP-table parsing).

/Mikael
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