fc 3 powerdown hang

[James Wilkinson]

Jonathan Berry wrote:
> It seems maybe there is a problem
> within the "acpi_power_off" function that isn't working correctly for
> some computers, and booting without acpi uses a different method to
> turn the power off.

Yes, it's called APM. APM is the older standard for power management. It
won't co-exist with ACPI, so the APM functionality is only enabled if
ACPI is turned off.

APM doesn't work for SMP, and so presumably doesn't work when
Hyperthreading is enabled.

James.
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