Messages in this thread | | | Date | Wed, 10 Dec 2003 07:55:16 -0600 | From | Ryan Underwood <> | Subject | Re: [ACPI] IO-APIC on MS-6163 (2.4.23). ACPI? |
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On Wed, Dec 10, 2003 at 02:40:25PM +0100, Mikael Pettersson wrote: > 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).
I went back and found the messages corresponding to our previous discussions:
http://www.cs.helsinki.fi/linux/linux-kernel/2003-23/1675.html
Looks like again I've confused the local APIC with the IO-APIC regarding that blacklist entry. However, I thought 440BX had a IO-APIC built-in to the southbridge. Again, that was proved to be wrong by examining the integrator's guide: ftp://download.intel.com/design/chipsets/designex/29063401.pdf
page 99 of the PDF says: "An I/O APIC is required for a DP system and optional for a UP system."
So it looks like I've never had an I/O-APIC on this board at all, only a local APIC, and this thread is thus a waste of time. :)
In any case, thanks for leading me to the right answer!
-- Ryan Underwood, <nemesis@icequake.net> [unhandled content-type:application/pgp-signature]
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