On Mon, 5 Dec 2005, Joe Rhett wrote:
On Thu, Dec 01, 2005 at 08:58:04PM +1100, Bruce Evans wrote:
It's not clear that disabling in the BIOS should disable for all OSes.
What? That's a fairly weird interpretation. If I want to disable inside a
given OS, I do that inside the OS. If I want to disable for _ALL_ OSes,
then I disable in the BIOS. What reasonable logic can argue otherwise?
The BIOS might not be layered under _all_ OSes, either due to its design
or implementation, or OSes not understanding how to talk to the BIOS, or
there being no way to talk BIOS.
Don't know. I avoid ACPI if possible :-). I suspect that FreeBSD can see
ACPI tables but not all BIOS tables, so any soft disabling in the BIOS gets
lost.
Can you really use everything without ACPI? What is lost by disabling ACPI?
Don't you lose power-down support at the least?
(I did look for a FAQ on ACPI and found darn little)
It's system-dependent. ACPI is now essential for most portable
computers. I don't have one , and lose only faster interrupt handing
via the APIC on workstations. This is a small loss since the APIC is
broken on 1/2 of my systems that have both ACPI and APIC so APIC cannot
be configured on one, and the other one doesn't do much interrupt
handling or benchmarks thereof so I don't care if it would have faster
interrupt handling using APIC.
Bruce
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