From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753140AbdK0SSa (ORCPT ); Mon, 27 Nov 2017 13:18:30 -0500 Received: from er-systems.de ([148.251.68.21]:59960 "EHLO er-systems.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753096AbdK0SS3 (ORCPT ); Mon, 27 Nov 2017 13:18:29 -0500 X-Greylist: delayed 548 seconds by postgrey-1.27 at vger.kernel.org; Mon, 27 Nov 2017 13:18:29 EST Date: Mon, 27 Nov 2017 19:09:13 +0100 (CET) From: Thomas Voegtle X-X-Sender: thomas@er-systems.de To: daniel.vetter@ffwll.ch cc: liviu@dudau.co.uk, john.stultz@linaro.org, treding@nvidia.com, linux-kernel@vger.kernel.org, maarten.lankhorst@linux.intel.com Subject: v4.14/v4.15-rc1: deferred setup in drm/fb-helper breaks entering pc3 Message-ID: User-Agent: Alpine 2.20 (LSU 67 2015-01-07) MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset=US-ASCII X-Virus-Checker-Version: clamassassin 1.2.4 with clamdscan / ClamAV 0.99.2/24079/Mon Nov 27 18:07:05 2017 signatures . Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, with v4.14 I recognized that my file server (headless haswell system) doesn't enter packages pc3 anymore and only enters pc2 according to powertop. In v4.13 the system used pc2 and pc3. So I bisected that down to: ca91a2758fcef6635626993557dd51cfbb6dd134 is the first bad commit commit ca91a2758fcef6635626993557dd51cfbb6dd134 Author: Daniel Vetter Date: Thu Jul 6 15:00:21 2017 +0200 drm/fb-helper: Support deferred setup Reverting this commit on top of v4.14 and v4.15-rc1 fixes the problem and the system uses package states pc2 and pc3 again. Nothing is connected to the VGA and DVI port. I'm using a kernel without modules on openSUSE 42.3. I have no "vga=xxx" or something like that on the cmdline. Thanks, Thomas