From owner-freebsd-acpi@FreeBSD.ORG  Thu Aug 18 23:17:16 2011
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Date: Thu, 18 Aug 2011 23:48:24 +0100
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From: Nik A Azam <freebsd-list@nikazam.com>
To: freebsd-acpi@freebsd.org
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Subject: C2/C3 state not available on Intel Q9550/X7SBE
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Dear all,

I've been trying to figure out why FreeBSD isn't detecting C2/C3 states on
this machine. It's running on really fresh 8-STABLE. The only related
options that I can find in BIOS is C1E, and EIST, which are both enabled.
I've tried turning them on/off, but still no luck.

I've uploaded the acpidump -dt output to http://pastebin.com/fu1kh8v5 and
verbose dmesg to http://pastebin.com/jZmeNXCi.

Thanks in advance,
Nik