From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@bugzilla.kernel.org Subject: [Bug 66581] intel_pstate/powersave - cpu frequency remains at high level (Turbo) after suspend/resume Date: Thu, 05 Dec 2013 19:45:20 +0000 Message-ID: References: Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: cpufreq-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii" To: cpufreq@vger.kernel.org https://bugzilla.kernel.org/show_bug.cgi?id=66581 --- Comment #7 from Lado Kumsiashvili --- OK, attached. Another strange thing. I think I have never noticed before, because I have this laptop since a couple of days. After I have booted cpufreq showed 2.80ghz at all cores without any last. THen I have executed max_perf_pct showed 100 and min_perf_pct showed 21 I has never gone below 2.80Ghz After I have executed echo 21 > /sys/devices/system/cpu/intel_pstate/max_perf_pct it went down to 800Mhz as expected in cpupower tool view genlap ~ # cpupower -c 0-4 frequency-info | grep current current policy: frequency should be within 800 MHz and 3.80 GHz. current CPU frequency is 800 MHz (asserted by call to hardware). current policy: frequency should be within 800 MHz and 3.80 GHz. current CPU frequency is 800 MHz (asserted by call to hardware). current policy: frequency should be within 800 MHz and 3.80 GHz. current CPU frequency is 800 MHz (asserted by call to hardware). current policy: frequency should be within 800 MHz and 3.80 GHz. current CPU frequency is 800 MHz (asserted by call to hardware). current policy: frequency should be within 800 MHz and 3.80 GHz. current CPU frequency is 800 MHz (asserted by call to hardware). current CPU frequency is 800 MHz (asserted by call to hardware). When I put the value 100 in the max_perf_pct it goes now between 2.80 and somewhere 3.30Ghz and changes all the time as I execute cpupower. But, before I have touched this max_perf_pct after the boot it was constantly on 2.80. With regards, Lado -- You are receiving this mail because: You are the assignee for the bug.