From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael Frank" Subject: Re: problem with cpu eating too much power, prize given if solved Date: Wed, 30 Jun 2004 04:17:38 +0800 Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Message-ID: References: <20040624153513.GB19545@rap.rap.dk> <20040628204008.GK698@openzaurus.ucw.cz> Mime-Version: 1.0 Content-Type: text/plain; format=flowed; delsp=yes; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Return-path: 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 , keld-6PR53cSIHaE@public.gmane.org Cc: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-acpi@vger.kernel.org On Mon, 28 Jun 2004 22:40:09 +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? Which hardware can power down the CPU on its own? ------------------------------------------------------- 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