From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dominik Brodowski Subject: Re: performance mgt and sleep don't work on Acer TM621 Date: Mon, 13 Jan 2003 15:07:31 +0100 Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Message-ID: <20030113140731.GA7365@brodo.de> References: <200301131416.14923.mrvanes@bigfoot.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <200301131416.14923.mrvanes-jG/AHqQBv7lBDgjK7y7TUQ@public.gmane.org> Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: To: Martin van Es Cc: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-acpi@vger.kernel.org Hi, On Mon, Jan 13, 2003 at 02:16:14PM +0100, Martin van Es wrote: > Recently I started experimenting with the 'write' interface and tried to > get the performance of my coppermine PIII 1G to switch from 1G to 733MHz > or vise versa using > echo -n 1 > /proc/acpi/CPU0/performance > > But both 'cat'ing performance to see what happened and running bogomips > show my processor is still running @ 1GHz. It is also the other way round. > Once booted at 733MHz (because of absence of AC adapter) it cannot be forced > into 1G, even with AC attached. > > Info tells me performance management is available: > cat /proc/acpi/processor/CPU0/info: > processor id: 0 > acpi id: 1 > bus mastering control: yes > power management: yes > throttling control: no > performance management: yes > limit interface: yes > > cat /proc/acpi/processor/CPU0/performance: > state count: 2 > active state: P0 > states: > *P0: 1000 MHz, 20000 mW, 500 uS > P1: 733 MHz, 10000 mW, 500 uS > > Am I doing something wrong? Forgot to compile in something? Have you compiled CONFIG_ACPI_DEBUG in? Are there any "strange" messages in "dmesg" after you try such a frequency transition? BTW, if this is an Intel mobile processor and an Intel southbridge (ICH2-M or ICH3-M), you might want to try cpufreq instead ( http://www.brodo.de/cpufreq/advanced.html ). Dominik ------------------------------------------------------- This SF.NET email is sponsored by: FREE SSL Guide from Thawte are you planning your Web Server Security? Click here to get a FREE Thawte SSL guide and find the answers to all your SSL security issues. http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0026en