I am trying to enable all the power saving features I can on my Conroe E6600. After much searching on the web, I am a little confused about the Linux kernel support for ACPI on the Conroe.
Here is my setup:
Intel Core2 Duo E6600
Asus P5-B Deluxe board (Intel P965).
I am running a Gentoo kernel based on 2.6.19.4.
I have managed to enable EIST using cpufreq with the speedstep-centrino driver. But my understanding from browsing the ACPI spec is that this is still within C0, i.e. not much power savings.
Here are my questions:
1) For P states, which cpufreq driver should I be using? I've heard speedstep-centrino is deprecated (but only some aspects of it) that are
being moved into acpi-cpufreq. But I can't get acpi-cpufreq to load in my kernel version. Also, I would have thought speedstep-ich would be
the driver, just based on the name. How do I know (other than trying
all modules to see which one loads) which one I should be using?
2) What kind of support for C1-C3 does the Conroe have? The ACPI spec says C2 and C3 require chipset support on the motherboard. Does P965 have that. Does it matter between boards (e.g. P5B)?