From owner-freebsd-acpi@FreeBSD.ORG Mon Apr 19 15:23:43 2010 Return-Path: Delivered-To: freebsd-acpi@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id D9681106566C for ; Mon, 19 Apr 2010 15:23:43 +0000 (UTC) (envelope-from jhb@freebsd.org) Received: from cyrus.watson.org (cyrus.watson.org [65.122.17.42]) by mx1.freebsd.org (Postfix) with ESMTP id ACB778FC1E for ; Mon, 19 Apr 2010 15:23:43 +0000 (UTC) Received: from bigwig.baldwin.cx (66.111.2.69.static.nyinternet.net [66.111.2.69]) by cyrus.watson.org (Postfix) with ESMTPSA id 645E146B06; Mon, 19 Apr 2010 11:23:43 -0400 (EDT) Received: from jhbbsd.localnet (smtp.hudson-trading.com [209.249.190.9]) by bigwig.baldwin.cx (Postfix) with ESMTPA id 92FC88A025; Mon, 19 Apr 2010 11:23:42 -0400 (EDT) From: John Baldwin To: freebsd-acpi@freebsd.org Date: Mon, 19 Apr 2010 08:34:08 -0400 User-Agent: KMail/1.12.1 (FreeBSD/7.3-CBSD-20100217; KDE/4.3.1; amd64; ; ) References: In-Reply-To: MIME-Version: 1.0 Message-Id: <201004190834.08800.jhb@freebsd.org> Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.0.1 (bigwig.baldwin.cx); Mon, 19 Apr 2010 11:23:42 -0400 (EDT) X-Virus-Scanned: clamav-milter 0.95.1 at bigwig.baldwin.cx X-Virus-Status: Clean X-Spam-Status: No, score=-2.6 required=4.2 tests=AWL,BAYES_00 autolearn=ham version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on bigwig.baldwin.cx Cc: Andreas Nilsson Subject: Re: C-states on core-i7m X-BeenThere: freebsd-acpi@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: ACPI and power management development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 19 Apr 2010 15:23:43 -0000 On Sunday 18 April 2010 4:52:33 am Andreas Nilsson wrote: > Hello, > > my new laptop has a core-i7 620m and I expected it to have support for > C3-state. > sysctl dev.cpu.0 > dev.cpu.0.%desc: ACPI CPU > dev.cpu.0.%driver: cpu > dev.cpu.0.%location: handle=\_PR_.CPU0 > dev.cpu.0.%pnpinfo: _HID=none _UID=0 > dev.cpu.0.%parent: acpi0 > dev.cpu.0.freq: 149 > dev.cpu.0.freq_levels: 2667/25000 2533/23710 2399/22465 2266/21243 > 2133/20027 1999/18852 1866/17700 1733/16571 1599/15478 1466/14395 1333/13334 > 1199/12297 1049/10759 899/9222 749/7685 599/6148 449/4611 299/3074 149/1537 > dev.cpu.0.cx_supported: C1/3 C2/245 > dev.cpu.0.cx_lowest: C2 > dev.cpu.0.cx_usage: 100.00% 0.00% last 500us > > I've never seen it acutally use even C2. Are lower C-states not supported > yet for the core i7 cpus? I have used C3 on i7 CPUs. I would check your BIOS options perhaps. Note that in the BIOS what shows up as "C3" to ACPI may be called "C6/C7". -- John Baldwin