From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeremy Fitzhardinge Subject: Re: speedstep-centrino on merom Date: Thu, 05 Oct 2006 11:30:51 -0700 Message-ID: <45254F5B.1060805@goop.org> References: Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: cpufreq-bounces@lists.linux.org.uk Errors-To: cpufreq-bounces+glkc-cpufreq=gmane.org+glkc-cpufreq=gmane.org@lists.linux.org.uk Content-Type: text/plain; charset="us-ascii"; format="flowed" To: Johannes Petersson , cpufreq@lists.linux.org.uk Johannes Petersson wrote: > Hello there > > I've just built a system with a Core 2 Duo T7200 (merom) processor. And the > reason I write you is cause the speed stepping does not seem to work > perfectly on this new processor. When I try to load the speedstep-centrino > module I get the following: > > modprobe -v speedstep-centrino > insmod > /lib/modules/2.6.15-27-686/kernel/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.ko > This is a fairly old kernel, and there has been quite a bit of work on this area lately. I'm not actively maintaining speedstep-centrino anymore; you should post this to cpufreq@lists.linux.org.uk (cc:'d). > FATAL: Error inserting speedstep_centrino > (/lib/modules/2.6.15-27-686/kernel/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.ko): > No such device > > If I load the acpi-cpufreq module instead it works okay, but the available > speedstepping frequenzies are only: > 1200000 1000000 800000 600000 > And since this is a 2 GHz processor I want it to be able to run at 2 GHz as > well. > This problem, I suppose, is probably due to a faulty DSDT reported by the > bios. > > I would really like to use the speedstep-centrino module instead. I work as > a C/C++ programmer, so what I did was open the speedstep-centrino.c file in > the linux source, and from what I can see there there is no support for > merom (or yonah). > > So my question to you is if there is any work beeing done on this module to > support Core 2 Duo (merom) processors? Or is the recommended way to go, to > use the acpi-cpufreq instead? Or if you could guide me a little to maybe add > support for Merom? > J