What version of acpi is supported?

[Nate Lawson]

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?
>>
> 
> No.

It might be that your BIOS requires you to have cpufreq if you ask it 
for acpi v2+.

-Nate