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Date: Fri, 19 Jun 2009 14:10:02 +0300
From: Andriy Gapon <avg@icyb.net.ua>
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To: John Baldwin <jhb@freebsd.org>
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Cc: Alexander Best <alexbestms@math.uni-muenster.de>,
	freebsd-current@freebsd.org, freebsd-acpi@freebsd.org
Subject: Re: estX still not attaching properly
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on 18/06/2009 16:09 John Baldwin said the following:
> On Wednesday 17 June 2009 2:29:25 pm Alexander Best wrote:
>> hi there,
>>
>> although i'm running a very recent current which has "ACPICA 20090521", estX
>> still isn't attaching properly on my machine:
>>
>> est0: <Enhanced SpeedStep Frequency Control> on cpu0
>> est: CPU supports Enhanced Speedstep, but is not recognized.
>> est: cpu_vendor GenuineIntel, msr 925092506000925
>> device_attach: est0 attach returned 6
>> est1: <Enhanced SpeedStep Frequency Control> on cpu1
>> est: CPU supports Enhanced Speedstep, but is not recognized.
>> est: cpu_vendor GenuineIntel, msr 925092506000925
>> device_attach: est1 attach returned 6
> 
> That just means ACPI isn't providing info about the speed steppings your CPU 
> provides.  It is odd that cpu0 has freq_levels but cpu1 does not.
> 

This is most probably not related to the issue at hand.
But I have some (probably unfounded) suspicions about OS features that we
advertise via _PDC.

Also, I find the following interesting in acpi_cpu.c.
First we call _PDC, then we call _OSC and then there is the following comment
between the two calls:
/*
 * On some systems we need to evaluate _OSC so that the ASL
 * loads the _PSS and/or _PDC methods at runtime.
...

-- 
Andriy Gapon