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From: Andreas Nilsson <andrnils@gmail.com>
To: Dan Lukes <dan@obluda.cz>, freebsd-acpi@freebsd.org
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Subject: Re: C-states on core-i7m
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On Sun, Apr 18, 2010 at 9:27 AM, Dan Lukes <dan@obluda.cz> wrote:

> Andreas Nilsson wrote:
> > my new laptop has a core-i7 620m and I expected it to have support for
> > C3-state.
>
> > dev.cpu.0.cx_supported: C1/3 C2/245
>
> My notebook announce the C3 state support only running on batteries, but
> not on AC. I assume it's not bug, it's "by design" behavior.
>
>                                        Dan
>
>
I grabbed that output while running on batteries, having booted the laptop
on
batteries. Do you ever see it actually use a lower C-state?

I guess it might be a bios-issue too, this is a Lenovo t510 which seems to
have
a pretty screwed up bios so far.

Andreas