Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753414AbZGDUoU (ORCPT ); Sat, 4 Jul 2009 16:44:20 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752219AbZGDUoL (ORCPT ); Sat, 4 Jul 2009 16:44:11 -0400 Received: from ioctl.codeblau.de ([80.190.240.67]:44285 "EHLO codeblau.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750901AbZGDUoL (ORCPT ); Sat, 4 Jul 2009 16:44:11 -0400 X-Greylist: delayed 398 seconds by postgrey-1.27 at vger.kernel.org; Sat, 04 Jul 2009 16:44:10 EDT Date: Sat, 4 Jul 2009 22:37:32 +0200 From: Felix von Leitner To: Linux Kernel Mailing list Subject: Core i7 not scaling frequency down Message-ID: <20090704203732.GA20170@codeblau.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.13 (2006-08-11) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1036 Lines: 34 Hi, I just got a Nehalem CPU and it works OK except that the fans are always running full power and it produces heat like an oven. $ cat /proc/acpi/processor/P001/info processor id: 0 acpi id: 1 bus mastering control: yes power management: yes throttling control: no limit interface: no $ Oh, no throttling and no limit support? How can this be? I'm using 2.6.30 but this appears to be bogus; Windows scales down the CPU frequency OK. Does this mean my BIOS ACPI tables are bogus? I get this message at boot time, but it appears to be unrelated: ACPI Warning (tbutils-0246): Incorrect checksum in table [OEMB] - 00, should be FE [20090320] Any ideas what I could do now to get the CPU to slow down? Thanks, Felix -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/