From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933874AbcFQNfU (ORCPT ); Fri, 17 Jun 2016 09:35:20 -0400 Received: from mga09.intel.com ([134.134.136.24]:61132 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933441AbcFQNfR (ORCPT ); Fri, 17 Jun 2016 09:35:17 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.26,483,1459839600"; d="scan'208";a="1004305756" From: Jani Nikula To: Daniel Vetter , James Bottomley Cc: Daniel Vetter , intel-gfx , dri-devel , linux-kernel , Rodrigo Vivi Subject: Re: [Intel-gfx] Bad flicker on skylake HQD due to code in the 4.7 merge window In-Reply-To: <20160617072826.GI23520@phenom.ffwll.local> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo References: <1464638381.2240.3.camel@HansenPartnership.com> <871t4ibr7k.fsf@intel.com> <1464701638.2234.1.camel@HansenPartnership.com> <87mvmp9z03.fsf@intel.com> <1466111747.2311.1.camel@HansenPartnership.com> <1466112547.2311.3.camel@HansenPartnership.com> <1466116932.2257.4.camel@HansenPartnership.com> <20160617072826.GI23520@phenom.ffwll.local> User-Agent: Notmuch/0.22+9~g73339ad (http://notmuchmail.org) Emacs/24.4.1 (x86_64-pc-linux-gnu) Date: Fri, 17 Jun 2016 16:34:57 +0300 Message-ID: <87vb18uef2.fsf@intel.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 17 Jun 2016, Daniel Vetter wrote: > On Thu, Jun 16, 2016 at 03:42:12PM -0700, James Bottomley wrote: >> On Thu, 2016-06-16 at 14:29 -0700, James Bottomley wrote: >> > On Thu, 2016-06-16 at 23:24 +0200, Daniel Vetter wrote: >> > > I guess we'll need the bisect on this one to make progress. >> > >> > Sigh, I was afraid that might be the next step. >> >> OK, I have a curious data point. I assumed the problem would be >> somewhere in the drm update, so I started bisecting that at the top. >> However, the top most commit: >> >> commit 1d6da87a3241deb13d073c4125d19ed0e5a0c62c >> Merge: 1f40c49 a39ed68 >> Author: Linus Torvalds >> Date: Mon May 23 11:48:48 2016 -0700 >> >> Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux >> >> Isn't actually bad. There's no flicker here, so whatever caused the >> problem came from some update after this. > > There was a fixes pull after this. Might be worth it to restrict to just > the i915 changes, which are just 5b4fd5b1111b1230cd037..157d2c7fad0863222 > > Looking at those nothing seems to stick out which might explain what's > happening for you. This should be easy enough to try before bisecting: http://patchwork.freedesktop.org/patch/msgid/1466162081-12042-1-git-send-email-mika.kahola@intel.com BR, Jani. -- Jani Nikula, Intel Open Source Technology Center