Dear PowerTop Developers, I have been wondering for a while and just found out: tunables show: Bad Using 'ondemand' cpufreq governor but: I don't have a ondemand cpufreq governor -- that is what I just found out: since some kernel versions ago the intel_pstate driver is the default for my cpu: # zgrep PSTATE /proc/config.gz CONFIG_X86_INTEL_PSTATE=y # cat /sys/devices/system/cpu/cpu[0-9]*/cpufreq/scaling_driver intel_pstate intel_pstate intel_pstate intel_pstate intel_pstate does not provide ondemand governor, just powersave and performance. It saves power by putting the cpu in sleep mode instead of decreasing the frequency, see idle stats: C7-SNB 98.7% ... Please include a check in PowerTop so ondemand governor does not get suggested for intel_pstate. That was really confusing at first to have powertop suggest that but me not having ondemand governor. -- Mit freundlichen Grüßen / With kind regards ------------------------------------------- Christian Krause Wissenschaftliche und Kaufmännische Datenverarbeitung / Scientific and Commercial Data Processing (WKDV) Wissenschaftliches Rechnen und Wissenschaftliches Datenmanagement / Scientific Computing and Scientific Data Management (WRWD) ------------------------------------------- Helmholtz-Zentrum für Umweltforschung GmbH - UFZ / Helmholtz Centre for Environmental Research - UFZ Permoserstr. 15 / 04318 Leipzig / Germany phone +49 341 235 1001 / fax +49 341 235 1468 <christian.krause(a)ufz.de&gt; / <http://www.ufz.de> Sitz der Gesellschaft: Leipzig Registergericht: Amtsgericht Leipzig, Handelsregister Nr. B 4703 Vorsitzender des Aufsichtsrats: MinDirig Wilfried Kraus Wissenschaftlicher Geschäftsführer: Prof. Dr. Georg Teutsch Administrative Geschäftsführerin: Dr. Heike Graßmann ------------------------------------------- Bitte denken Sie an die Umwelt bevor Sie diese E-Mail ausdrucken. / Please consider the environment before printing this e-mail. -------------------------------------------