From mboxrd@z Thu Jan 1 00:00:00 1970 From: Harry van Haaren Subject: Re: CpuFreq Laptop Scaling broken? Date: Mon, 25 Aug 2014 16:03:27 +0100 Message-ID: References: <20140825101055.731e4a21@gandalf.local.home> <53FB4EEF.3060809@pavlinux.ru> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Cc: Steven Rostedt , Viresh Kumar , linux-rt-users@vger.kernel.org, "Rafael J. Wysocki" , Thomas Gleixner To: pavel@pavlinux.ru Return-path: Received: from mail-la0-f48.google.com ([209.85.215.48]:64632 "EHLO mail-la0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932495AbaHYPD3 (ORCPT ); Mon, 25 Aug 2014 11:03:29 -0400 Received: by mail-la0-f48.google.com with SMTP id gl10so12825546lab.7 for ; Mon, 25 Aug 2014 08:03:27 -0700 (PDT) In-Reply-To: <53FB4EEF.3060809@pavlinux.ru> Sender: linux-rt-users-owner@vger.kernel.org List-ID: On Mon, Aug 25, 2014 at 3:57 PM, Pavel Vasilyev wrote: >>>> # Attempt to set min freq of 2GHz (max) of this core2duo >>>> $ echo 2000000 > /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq >>>> bash: /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq: Permission >>>> denied > > cpuinfo_min_freq - Read-only file, use scaling_min_freq $ echo 2000000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq bash: echo: write error: Invalid argument No success there.