From mboxrd@z Thu Jan 1 00:00:00 1970 From: Len Brown Subject: Re: Centrino question Date: 27 May 2004 02:22:43 -0400 Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Message-ID: <1085638963.17693.71.camel@dhcppc4> References: <3ACA40606221794F80A5670F0AF15F8404622C57@PDSMSX403.ccr.corp.intel.com> <20040520015748.776d5b84.neurowork@free.fr> <1085111429.12352.563.camel@dhcppc4> <20040521125637.33f69fc6.neurowork@free.fr> <20040521115207.GA12775@hell.org.pl> <1085161136.9856.5.camel@Neuromancer.home.net> <1085527691.9167.39.camel@dorker.boxed.no> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1085527691.9167.39.camel-x1HDAq6LUf79HyLP1LL8ZA@public.gmane.org> Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Alexander Hoogerhuis Cc: Ow Mun Heng , ACPI Developers List-Id: linux-acpi@vger.kernel.org On Tue, 2004-05-25 at 19:28, Alexander Hoogerhuis wrote: > On Fri, 2004-05-21 at 10:38 -0700, Ow Mun Heng wrote: > > On Fri, 2004-05-21 at 04:52, Karol Kozimor wrote: > > > Thus wrote Cyril Wattebled: > > > > However, I don't understand, I was told that the centrino processor and chipset > > > > supports C3 and even C4. > > > > C3 is Supported > > > > > > active state: C2 > > default state: C1 > > bus master activity: ffffffff > > states: > > C1: promotion[C2] demotion[--] latency[000] usage[01028830] > > *C2: promotion[C3] demotion[C1] latency[050] usage[04785987] > > C3: promotion[--] demotion[C2] latency[050] usage[00001327] > > > > This is a Dell D600 1.4g. c3 values are low because I have the USB mouse > > on right now. (note the fffffff??) > > > > I've tested it with and w/o C3. The difference in the battery lifetime > > was only very minmal. I got like maybe 10 mins extra. > > I last 2:30 on Linux and 3h on Windows. > > > > Batt Life Sucks.. try dimming the display. > > I've been through tracking down what disables C3 on my laptop (HP > nc6000). It all happens when the uhci-hci USB drviver goes in. When I > queried about it on lkml a while back it was due tro some support > lacking in the UHCI dirvers as of yet. USB needs to do a better job of recognizing that it is idle. It isn't really a USB bug, or a missing feature -- more of a "system integration" issue... -Len ------------------------------------------------------- This SF.Net email is sponsored by: Oracle 10g Get certified on the hottest thing ever to hit the market... Oracle 10g. Take an Oracle 10g class now, and we'll give you the exam FREE. http://ads.osdn.com/?ad_id=3149&alloc_id=8166&op=click