We disable all ACPI-related items in the kernel configuration; this does
sometimes cause hardware not to work (for instance, the ipw2200 on one
of my laptops doesn't work without ACPI PNP).  The reason that we
disable these items is that some parts of ACPI are related to power
management, and power management features historically have interfered
with realtime software.  This may be more superstition than exhaustive
testing, but that's the way it goes.

(the other reason "some ACPI" would be nice to have is for power off
when shutting down linux)

Jeff

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