[Bug 516325] Re: ACPI: enable C2 and Turbo-mode on Nehalem notebooks on A/C

[Stefan Bader]

If it is a 2.6.32-13.18 kernel, then the patch is included. Now for
usage, from the description I would say without it and a high latency
announced C2 would not get used at all. If you see usage of C2 then I
would say the patch works. But with a high latency announced the system
less often will select C2 as it considers the longer time to get out of
that.

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ACPI: enable C2 and Turbo-mode on Nehalem notebooks on A/C
https://bugs.launchpad.net/bugs/516325
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