From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dave Jones Subject: Re: Core2Duo locked at 800MHz Date: Mon, 26 Nov 2007 14:09:29 -0500 Message-ID: <20071126190929.GE15764@redhat.com> References: <474A6C62.3070103@reinelt.co.at> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <474A6C62.3070103@reinelt.co.at> 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=m.gmane.org+glkc-cpufreq=m.gmane.org@lists.linux.org.uk To: Michael Reinelt Cc: cpufreq@lists.linux.org.uk On Mon, Nov 26, 2007 at 06:49:06AM +0000, Michael Reinelt wrote: > What I found out is that the problem seems to be related to ACPI or the > acpi-cpufreq module. When I boot the notebook into single-user mode > (using vanilla 2.6.23 or 2.6.24-rc3), with no modules loaded, the cpu > runs at 2.4GHz. As soon as I laod the acpi-cpufreq module, the upper > limit falls in some steps (2 GHz, 1200MHz) to 800 MHz. Note that there > is neither acpid nor any powersave daemon running! Do you have CONFIG_CPU_FREQ_GOV_ONDEMAND enabled in your kernel ? > I tried to play with cpufreq.debug, but I don't know what all the > messages are about :-( If you had attached them, we might have had some clues. > I already installed the latest BIOS 1.08 from Fujitsu, but nothing changes. > > At the moment my workaround is *not* to load acpi-cpufreq, so the CPU > stays at 2.4GHz all the time, but I really want to use powersaving with > the machine.... I'm confused. It sounds like you _are_ using power saving. The whole purpose of cpufreq is to lower the cpu speed when idle. If you run some cpu intensive load like a big compile, does the speed go back up ? > I'm willing to provide all necessary infos If you tell me what to to. the cpufreq.debug=7 logs would be a good start. Dave -- http://www.codemonkey.org.uk