From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752148AbdK1JSn (ORCPT ); Tue, 28 Nov 2017 04:18:43 -0500 Received: from mga11.intel.com ([192.55.52.93]:60130 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751664AbdK1JSl (ORCPT ); Tue, 28 Nov 2017 04:18:41 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.44,467,1505804400"; d="scan'208";a="153953594" Subject: Re: v4.14/v4.15-rc1: deferred setup in drm/fb-helper breaks entering pc3 To: Thomas Voegtle , daniel.vetter@ffwll.ch Cc: liviu@dudau.co.uk, john.stultz@linaro.org, treding@nvidia.com, linux-kernel@vger.kernel.org References: From: Maarten Lankhorst Message-ID: <575fff87-908c-c1d6-b504-54ec1f342662@linux.intel.com> Date: Tue, 28 Nov 2017 10:18:33 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.4.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Op 27-11-17 om 19:09 schreef Thomas Voegtle: > > 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 > Could you send some logs with drm.debug=0x1f ? ~Maarten