From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dominik Brodowski Subject: Re: Avoid C2/C3 idle state Date: Wed, 25 Nov 2009 09:05:37 +0100 Message-ID: <20091125080537.GA31368@isilmar.linta.de> References: <20091124222953.GA5983@isilmar.linta.de> <796045.7445.qm@web26501.mail.ukl.yahoo.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from isilmar.linta.de ([213.133.102.198]:40975 "EHLO linta.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750773AbZKYIFe (ORCPT ); Wed, 25 Nov 2009 03:05:34 -0500 Content-Disposition: inline In-Reply-To: <796045.7445.qm@web26501.mail.ukl.yahoo.com> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Alex Cc: linux-acpi@vger.kernel.org On Wed, Nov 25, 2009 at 06:53:14AM +0000, Alex wrote: > --- Mar 24/11/09, Dominik Brodowski ha s= critto: >=20 > > Da: Dominik Brodowski > > Oggetto: Re: Avoid C2/C3 idle state > > A: "Alex" > > Cc: linux-acpi@vger.kernel.org > > Data: Marted=EC 24 novembre 2009, 23:29 > > Hey, > >=20 > > you can set the maximum C-state to use using the > > "processor.max_cstate=3D" parameter. No need to > > recompile. >=20 > Thanks for your kind reply. >=20 > A stupid qustion: > is a numeric value as 1 , 2 , 3 (i.e. processor.max_cstate=3D= 1 ) > or is a string like C1 , C2 , C3 (i.e. processor.max_cstate=3DC1 ) ? It's the former. I'd suggest you try max_cstate=3D2 first, as that migh= t save power, reduce heat and still not interfere with the serial device. Best, Dominik -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html