From mboxrd@z Thu Jan 1 00:00:00 1970 From: Keld =?iso-8859-1?Q?J=F8rn?= Simonsen Subject: Re: problem with cpu eating too much power, prize given if solved Date: Tue, 29 Jun 2004 17:57:18 +0200 Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Message-ID: <20040629155718.GA1866@rap.rap.dk> References: <20040624153513.GB19545@rap.rap.dk> <20040628204008.GK698@openzaurus.ucw.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20040628204008.GK698-u08AdweFZfgxtPtxi4kahqVXKuFTiq87@public.gmane.org> Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Pavel Machek Cc: keld-6PR53cSIHaE@public.gmane.org, acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-acpi@vger.kernel.org On Mon, Jun 28, 2004 at 10:40:09PM +0200, Pavel Machek wrote: > Hi! > > > Many times I just want to read the screen, eg emails or documents, > > and then still the cpu will be in idle mode, where > > it uses 7.5 W out of the about 15 W that the whole machine uses. > > I have found out from Intel data sheets that my > > Mobile Intel Celeron 2.0 GHz CPU consumes 7.5 W in idle loop/ > > stop grant/sleep states, (and 5.0 W i deep sleep state). > > > > So I would like to have the CPU stopped completely (consuming 0 W) > > while I still could read the screen. In that way I should > > be able to have about double the lifetime on the battery, > > going to about 7 hours from the 3.5 hours I have now. > > > > I would like the machine to wake up again by any keystroke > > on the keyboard or mouse input. I would like the input to be > > reacted upon (not just used to wake up the system, and > > then forgotten). > > > > S1 is what you want... but... if you get what you asked for, > do you realize that for example clock would not update on the desktop > in this mode? Maybe S1 is what could do this. I understand that I could not then have the clock updated every second but every minute would work, and even if the screen was not updated every minute it would be fine. But I would expect the clock to be accurate when the cpu is started again. Best regards Keld ------------------------------------------------------- This SF.Net email sponsored by Black Hat Briefings & Training. Attend Black Hat Briefings & Training, Las Vegas July 24-29 - digital self defense, top technical experts, no vendor pitches, unmatched networking opportunities. Visit www.blackhat.com