Kevin Oberman wrote:
Date: Fri, 16 Dec 2005 14:29:39 -0600
From: Craig Boston <[EMAIL PROTECTED]>
Sender: [EMAIL PROTECTED]
-cpu0: <ACPI CPU (4 Cx states)> on acpi0
+cpu0: <ACPI CPU> on acpi0
Q: Guessing that's a formatting difference, rather then 6.x not recognizing
the states (sysctl hw.acpi.cpu.cx_supported confirms 4 states)
Not sure on this, but you're probably better off using EST anyway as I
think it gives you more control over the processor frequency.
No. There is no conflict between Cx states and EST. Cx states specifies
how deeply the CPU will sleep when idle. EST controls processor speed
and voltage. In most cases, your REALLY want to use both of these. They
are very significant in saving power. (Of course, USB tends to limit the
effectiveness of Cx states. I need to run without USB to get really good
battery life and to make suspend (S3) really ut power drain.
Kevin,
I used to have 3 Cx states supported when I started with FreeBSD on
version 5.3. Since I upgraded to 5.4 and recently to 6.0, all I can see
is just one supported Cx state. I much wonder why. (?)
Cheers,
Martin
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