Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754904AbZGEI2s (ORCPT ); Sun, 5 Jul 2009 04:28:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752978AbZGEI2k (ORCPT ); Sun, 5 Jul 2009 04:28:40 -0400 Received: from casper.infradead.org ([85.118.1.10]:35249 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752893AbZGEI2j (ORCPT ); Sun, 5 Jul 2009 04:28:39 -0400 Date: Sun, 5 Jul 2009 01:30:01 -0700 From: Arjan van de Ven To: Felix von Leitner Cc: Linux Kernel Mailing list Subject: Re: Core i7 not scaling frequency down Message-ID: <20090705013001.6e0c17bf@infradead.org> In-Reply-To: <20090704203732.GA20170@codeblau.de> References: <20090704203732.GA20170@codeblau.de> Organization: Intel X-Mailer: Claws Mail 3.7.1 (GTK+ 2.14.7; i386-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1301 Lines: 39 On Sat, 4 Jul 2009 22:37:32 +0200 Felix von Leitner wrote: > 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. how do you determine linux isn't scaling down? PowerTOP? (if not powertop.. you might want to use that ;-) > ACPI Warning (tbutils-0246): Incorrect checksum in table [OEMB] - > 00, should be FE [20090320] that's pretty bad, but might not be a table critical for C/P states... -- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org -- 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/