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SubjectRE: Intel ICH5 APIC, ACPI problems in 2.4
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Jeff,
I've seen word of a similar failure on VIA 8235, but on those I've got
neither the hardware nor the chipset documentation -- it would be great
if I could get this to fail on hardware I actually have...

BTW. The latest stuff in
http://linux-acpi.bkbits.net:8080/linux-acpi-2.4 should be able to boot
with acpi=ht, or you can build with just CONFIG_ACPI_HT, and that will
give you HT without any other parts of ACPI. Though if the platform has
no MPS, this option leaves the platform in XT-PIC mode since it doesn't
do IOAPIC discovery.

Feel free to dump the usual info into a kernel.org bug under
component=ACPI and assign it to me.

Thanks,
-Len

> -----Original Message-----
> From: Jeff Garzik [mailto:jgarzik@pobox.com]
> Sent: Monday, August 11, 2003 1:24 PM
> To: LKML
> Subject: Intel ICH5 APIC, ACPI problems in 2.4
>
>
> I have a couple uniprocessor ICH5 systems from different
> vendors, with
> similar behavior:
>
> 2.6: HyperThreading works, ACPI works, all irqs properly routed
>
> 2.4: HT works only works with ACPI enabled, but,
> ACPI kills the irq routing for the external PCI slots.
> pci=noacpi or whatever doesn't work. !CONFIG_ACPI + "noapic"
> fixes irq routing, but then no HT sibling appears.
>
> It seems like kernel 2.4.22-rc is missing some ACPI and possibly some
> APIC fixes?
>
> Jeff
>
>
>
> -
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