What version of acpi is supported?
nate at root.org
Tue Jul 15 23:19:25 UTC 2008
Steve Kargl wrote:
> On Tue, Jul 15, 2008 at 04:02:31PM -0700, Nate Lawson wrote:
>> Steve Kargl wrote:
>>> On Tue, Jul 15, 2008 at 03:30:04PM -0700, Nate Lawson wrote:
>>>> Steve Kargl wrote:
>>>>> I have several ASUS KFSN4-DRE motherboards. The BIOS
>>>>> allows one to select acpi version 1, 2, or 3 where 3
>>>>> is the defaults. Under heavy load and acpi v3, these
>>>>> motherboards shut themselves off. The boards appear
>>>>> to be stable if I select v1. So what, version of
>>>>> acpi does FreeBSD support?
>>>> Most of 1, a lot of 2, a little of 3.
>>> So does v2 or 3 must have a (low?) thermal protection
>>> mechanism that shuts down a system? And, can the
>>> threshold be tweaked?
>> It doesn't work that way. When you specify a version to the BIOS, it
>> changes the AML (byte code) that it exports to the OS. Depending on
>> what we do (or don't do) with it, the BIOS is deciding at some point it
>> doesn't like the OS behavior and shuts down. It could be anything.
>> You'd have to look at the AML to figure out what we're poking or not
>> poking that the BIOS isn't happy with.
> I was afraid you (or someone) would say something like the above.
> I used acpidump to get an ASL file, but it was after I booted with
> v1. It appears that I have a lot to learn about the crypted ASL.
>> Are you loading cpufreq?
It might be that your BIOS requires you to have cpufreq if you ask it
for acpi v2+.
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