From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755667AbcEaHvc (ORCPT ); Tue, 31 May 2016 03:51:32 -0400 Received: from mga14.intel.com ([192.55.52.115]:43731 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755323AbcEaHvb (ORCPT ); Tue, 31 May 2016 03:51:31 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.26,394,1459839600"; d="scan'208";a="992030828" From: Jani Nikula To: James Bottomley , intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Cc: linux-kernel , Rodrigo Vivi Subject: Re: Bad flicker on skylake HQD due to code in the 4.7 merge window In-Reply-To: <1464638381.2240.3.camel@HansenPartnership.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo References: <1464638381.2240.3.camel@HansenPartnership.com> User-Agent: Notmuch/0.22+12~gbdd9442 (http://notmuchmail.org) Emacs/24.4.1 (x86_64-pc-linux-gnu) Date: Tue, 31 May 2016 10:51:27 +0300 Message-ID: <871t4ibr7k.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 Mon, 30 May 2016, James Bottomley wrote: > I've tested a pristine 4.6.0 system, so it's definitely something that > went in during the merge window. The flicker isn't continuous, it's > periodic, with an interval of something like 2-5 seconds. It looks > like an old analogue TV going out of sync and then resyncing. I've > attached the dmesg and X.org log below just in case they can help. I > might be able to bisect this next week, but, unfortunately, this is my > current laptop and I'm travelling this week. Please try i915.enable_psr=0 module parameter. BR, Jani. -- Jani Nikula, Intel Open Source Technology Center