[Bug 55686] Re: Missing C3 state - Centrino duo

[gQuigs]

Apologies if I got this wrong.

"I see only C0, C1, and C2. Why don't the other C-states show?

It's mostly a BIOS thing. Some BIOS hide C3/C4 when on AC power, and others show only C3 which is really a C4 underneath when on battery. Note that the 'max_cstate:C8' value in /proc/acpi/processor/*/power tells the maximum number of C-states the Linux kernel can handle, not the number of C-states implemented in your hardware."
-http://www.lesswatts.org/projects/powertop/faq.php

** Changed in: linux-source-2.6.15 (Ubuntu)
       Status: New => Invalid

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Missing C3 state - Centrino duo
https://bugs.launchpad.net/bugs/55686
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