From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Beglin, Brad R" Subject: bug? acpi p-state + ondemand keeps dropping max freq Date: Tue, 10 Jun 2008 17:45:16 -0400 (EDT) Message-ID: <525679309.1481161213134316383.JavaMail.root@mail4.gatech.edu> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: 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: cpufreq@lists.linux.org.uk I am also unable to change my max scaling frequency on my Thinkpad T61. Interestingly enough, I can change the frequency as long as the new value is less than 1.2 GHz. If I try to set the new max frequency higher than that, the max scaling frequency file reverts to 1.2GHz. Here is in example: # echo 2001000 > scaling_max_freq ; cat scaling_max_freq 1200000 # echo 1000000 > scaling_max_freq ; cat scaling_max_freq 1000000 # echo 1600000 > scaling_max_freq ; cat scaling_max_freq 1200000 # echo 2000000 > scaling_max_freq ; cat scaling_max_freq 1200000 I have also tried to make the change while using "echo -n" with no success. I have also attempted to use a different governor, but that has no effect. Here is my cpufreq-info output: cpufrequtils 002: cpufreq-info (C) Dominik Brodowski 2004-2006 Report errors and bugs to linux@brodo.de, please. analyzing CPU 0: driver: acpi-cpufreq CPUs which need to switch frequency at the same time: 0 1 hardware limits: 800 MHz - 2.00 GHz available frequency steps: 2.00 GHz, 2.00 GHz, 1.60 GHz, 1.20 GHz, 800 MHz available cpufreq governors: conservative, userspace, ondemand, performance current policy: frequency should be within 800 MHz and 1.20 GHz. The governor "ondemand" may decide which speed to use within this range. current CPU frequency is 800 MHz (asserted by call to hardware). analyzing CPU 1: driver: acpi-cpufreq CPUs which need to switch frequency at the same time: 0 1 hardware limits: 800 MHz - 2.00 GHz available frequency steps: 2.00 GHz, 2.00 GHz, 1.60 GHz, 1.20 GHz, 800 MHz available cpufreq governors: conservative, userspace, ondemand, performance current policy: frequency should be within 800 MHz and 1.20 GHz. The governor "ondemand" may decide which speed to use within this range. current CPU frequency is 800 MHz (asserted by call to hardware). Hope this helps. mp. -- Brad R. Beglin Computational Media Undergraduate Georgia Institute of Technology