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Subject: RE: Intel ICH5 APIC, ACPI problems in 2.4
Date: Mon, 11 Aug 2003 18:42:38 -0400
Message-ID: <BF1FE1855350A0479097B3A0D2A80EE009FC2D@hdsmsx402.hd.intel.com>
Thread-Topic: Intel ICH5 APIC, ACPI problems in 2.4
Thread-Index: AcNgL1EeiqG+lZUURBGp6+1mw1zZsAAJ/NVA
From: "Brown, Len" <len.brown@intel.com>
To: "Jeff Garzik" <jgarzik@pobox.com>, "LKML" <linux-kernel@vger.kernel.org>
Sender: linux-kernel-owner@vger.kernel.org
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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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