From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michael Karcher Subject: power management regression in linux 3.10? Date: Mon, 03 Jun 2013 19:56:15 +0200 Message-ID: <1370282175.18020.4.camel@localhost> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Return-path: Received: from outpost1.zedat.fu-berlin.de ([130.133.4.66]:54316 "EHLO outpost1.zedat.fu-berlin.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753590Ab3FCSDI (ORCPT ); Mon, 3 Jun 2013 14:03:08 -0400 Received: from inpost2.zedat.fu-berlin.de ([130.133.4.69]) by outpost1.zedat.fu-berlin.de (Exim 4.80.1) for linux-pm@vger.kernel.org with esmtp (envelope-from ) id <1UjYyY-002WUX-VC>; Mon, 03 Jun 2013 19:55:22 +0200 Received: from port-92-204-81-8.dynamic.qsc.de ([92.204.81.8] helo=[192.168.178.20]) by inpost2.zedat.fu-berlin.de (Exim 4.80.1) for linux-pm@vger.kernel.org with esmtpsa (envelope-from ) id <1UjYyY-000p07-Q8>; Mon, 03 Jun 2013 19:55:22 +0200 Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: linux-pm@vger.kernel.org Hello, I am using an IBM ThinkPad T60 (i915, Core 2 Duo T7200) and recently upgraded from a custom 3.7 kernel to a custom 3.10-rc4 kernel (v3.10-rc4-1-gc026d8e). After upgrading, I get around 17-20W power usage instead of 12-15W power usage as I had with 3.7. powertop show that CPU0 is in state POLL all of the idle time, while CPU1 correctly enters C3. As this may be caused by my kernel configuration, I pastebinned my .config to http://pastebin.ca/2388457. Note that I am using CONFIG_NO_HZ_FULL, which might be nonstandard and actually not sensible for a standard single-user laptop system with GUI. Do you want me to try something to debug the problem? Regards, Michael Karcher