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    SubjectRE: Intel ICH5 APIC, ACPI problems in 2.4
    Date
    From
    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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