Intel ICH5 APIC, ACPI problems in 2.4

From: Jeff Garzik
Date: Mon Aug 11 2003 - 12:40:11 EST


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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