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Message-ID: <BAY20-F21042242E1DE82AF8A4EE7F9360@phx.gbl> Date: Tue, 22 May 2007 15:26:01 +0000 From: "Paa Paa" <paapaa125@...mail.com> To: hancockr@...w.ca Cc: linux-kernel@...r.kernel.org Subject: Re: Enabling power states for Core 2 Duo >>I'm probably missing something crucial here. So how do I enable power >>states? I'm using 64-bit Gentoo. My mobo is Asus P5B Deluxe. Otherwise >>ACPI works fine. > >The BIOS has to expose this support in ACPI, if it doesn't (which is often >the case on desktop boards) you won't get any C-state support (well, except >for C1 which is just the normal halt state). But unless I'm not mistaken, I don't have even the C1 state available. I seem to have only C0 according to "active state". "Active state is the sleep state currently used when the system is idle", isn't it? Here is the source: http://acpi.sourceforge.net/documentation/processor.html But are you saying that with most desktop mobos one doesn't usually have the different power states available at all? So basically the only means to conserve power is to scale the frequency? _________________________________________________________________ Express yourself instantly with MSN Messenger! Download today it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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