From mboxrd@z Thu Jan 1 00:00:00 1970 From: Erik Slagter Subject: Re: No c2-c7 states on core i7 Date: Sat, 21 Nov 2009 18:45:21 +0100 Message-ID: <4B082731.30909@slagter.name> References: <4B06A7A8.109@slagter.name> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from eriks.xs4all.nl ([83.160.41.216]:37980 "EHLO eriks.xs4all.nl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756546AbZKURpU (ORCPT ); Sat, 21 Nov 2009 12:45:20 -0500 Received: from nemesis.slagter.name (nemesis.ipv4.slagter.name [10.1.3.7]) by nemesis.slagter.name (Postfix) with ESMTP id 4ACE03B179 for ; Sat, 21 Nov 2009 18:45:22 +0100 (CET) Received: from artemis.slagter.name (artemis-vlan3.ipv6.slagter.name [IPv6:2001:888:133a:103::1]) by nemesis.slagter.name (Postfix) with ESMTP for ; Sat, 21 Nov 2009 18:45:22 +0100 (CET) Received: from [IPv6:2001:888:133a:103::2] (skylla.ipv6.slagter.name [IPv6:2001:888:133a:103::2]) by artemis.slagter.name (Postfix) with ESMTP id E7C933930B8D for ; Sat, 21 Nov 2009 18:45:21 +0100 (CET) In-Reply-To: <4B06A7A8.109@slagter.name> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: linux-acpi@vger.kernel.org As always this appears to be a BIOS problem (bug?) As soon as you change the BASECLOCK setting, all C states are withdrawn. I think it's really idiotic, and I am really going to try to enable them anyway. Interesting fact: the system uses almost exactly the same amount of power when C states are enabled by the BIOS and when they are disabled. Makes you wonder whether they actually do something at all. The linux counters really say they're called, anyway. So if you don't want a power-wasting board, don't buy a Gigabyte EX58-UD3R.