From mboxrd@z Thu Jan 1 00:00:00 1970 From: Len Brown Subject: Re: cpufreq on Debian, problems Date: Sun, 11 Mar 2007 19:45:12 -0500 Message-ID: <200703112045.12149.lenb@kernel.org> References: <553837380703111304m4aea8cbcufdc5da4261e41895@mail.gmail.com> <45F47282.4020209@chrestomanci.org> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <45F47282.4020209@chrestomanci.org> Content-Disposition: inline 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" To: cpufreq@lists.linux.org.uk Cc: Joshua Justice On Sunday 11 March 2007 17:20, David Pottage wrote: > Joshua Justice wrote: > > I'm running a Pentium 4, 3.40 gigahertz, on Debian Etch 2.6.18-4-686, > > and I have issues with overheating because cpu throttling isn't working. Check that your fan is properly installed, including thermal compound. You should not need throttling to cool a P4. Indeed, most of them don't support any P-states at all. -Len > Is your clock frequency scaling back when your system is not under load? > > If it is not, and you want it to, then you need to run the ondemand or > conservative govenor. Take a look in > /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors that > they are there, then echo a govenor name into > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor > > If the clock frequency is changing acording to your system load, but it > is still overheading, you probably need to improve your cooling hardware. > > If it is not practical to improve your CPU cooling, or if your peak > loads are ocasional, then you can prevent overheating by limiting the > CPU temperature. I have written a userland perl script that does this > automaticaly, by monitoring the CPU temperature, and lowering the > maximum CPU frequency if the temperature gets to high. You can have a > copy if you like.