From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jani Nikula Subject: Re: Bad flicker on skylake HQD due to code in the 4.7 merge window Date: Mon, 13 Jun 2016 13:14:36 +0300 Message-ID: <87mvmp9z03.fsf@intel.com> References: <1464638381.2240.3.camel@HansenPartnership.com> <871t4ibr7k.fsf@intel.com> <1464701638.2234.1.camel@HansenPartnership.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <1464701638.2234.1.camel@HansenPartnership.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: James Bottomley , intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Cc: linux-kernel , Rodrigo Vivi List-Id: dri-devel@lists.freedesktop.org T24gVHVlLCAzMSBNYXkgMjAxNiwgSmFtZXMgQm90dG9tbGV5IDxKYW1lcy5Cb3R0b21sZXlASGFu c2VuUGFydG5lcnNoaXAuY29tPiB3cm90ZToKPiBPbiBUdWUsIDIwMTYtMDUtMzEgYXQgMTA6NTEg KzAzMDAsIEphbmkgTmlrdWxhIHdyb3RlOgo+PiBPbiBNb24sIDMwIE1heSAyMDE2LCBKYW1lcyBC b3R0b21sZXkgPAo+PiBKYW1lcy5Cb3R0b21sZXlASGFuc2VuUGFydG5lcnNoaXAuY29tPiB3cm90 ZToKPj4gPiBJJ3ZlIHRlc3RlZCBhIHByaXN0aW5lIDQuNi4wIHN5c3RlbSwgc28gaXQncyBkZWZp bml0ZWx5IHNvbWV0aGluZwo+PiA+IHRoYXQKPj4gPiB3ZW50IGluIGR1cmluZyB0aGUgbWVyZ2Ug d2luZG93LiAgVGhlIGZsaWNrZXIgaXNuJ3QgY29udGludW91cywKPj4gPiBpdCdzCj4+ID4gcGVy aW9kaWMsIHdpdGggYW4gaW50ZXJ2YWwgb2Ygc29tZXRoaW5nIGxpa2UgMi01IHNlY29uZHMuICBJ dCBsb29rcwo+PiA+IGxpa2UgYW4gb2xkIGFuYWxvZ3VlIFRWIGdvaW5nIG91dCBvZiBzeW5jIGFu ZCB0aGVuIHJlc3luY2luZy4gIEkndmUKPj4gPiBhdHRhY2hlZCB0aGUgZG1lc2cgYW5kIFgub3Jn IGxvZyBiZWxvdyBqdXN0IGluIGNhc2UgdGhleSBjYW4gaGVscC4gCj4+ID4gIEkKPj4gPiBtaWdo dCBiZSBhYmxlIHRvIGJpc2VjdCB0aGlzIG5leHQgd2VlaywgYnV0LCB1bmZvcnR1bmF0ZWx5LCB0 aGlzIGlzCj4+ID4gbXkKPj4gPiBjdXJyZW50IGxhcHRvcCBhbmQgSSdtIHRyYXZlbGxpbmcgdGhp cyB3ZWVrLgo+PiAKPj4gUGxlYXNlIHRyeSBpOTE1LmVuYWJsZV9wc3I9MCBtb2R1bGUgcGFyYW1l dGVyLgo+Cj4gTWFrZXMgbm8gZGlzY2VybmFibGUgZGlmZmVyZW5jZS4gIEN1cnJlbnQgcGFyYW1l dGVyIHNldHRpbmdzIGFyZToKClNvcnJ5IGZvciB0aGUgc2lsZW5jZS4gV291bGQgeW91IG1pbmQg dHJ5aW5nIG91dCBkcm0taW50ZWwtbmlnaHRseQpicmFuY2ggb2YgWzFdPwoKQlIsCkphbmkuCgpb MV0gaHR0cDovL2NnaXQuZnJlZWRlc2t0b3Aub3JnL2RybS1pbnRlbAoKCi0tIApKYW5pIE5pa3Vs YSwgSW50ZWwgT3BlbiBTb3VyY2UgVGVjaG5vbG9neSBDZW50ZXIKX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX18KSW50ZWwtZ2Z4IG1haWxpbmcgbGlzdApJbnRl bC1nZnhAbGlzdHMuZnJlZWRlc2t0b3Aub3JnCmh0dHBzOi8vbGlzdHMuZnJlZWRlc2t0b3Aub3Jn L21haWxtYW4vbGlzdGluZm8vaW50ZWwtZ2Z4Cg== From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965288AbcFMKOk (ORCPT ); Mon, 13 Jun 2016 06:14:40 -0400 Received: from mga04.intel.com ([192.55.52.120]:56803 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964862AbcFMKOj (ORCPT ); Mon, 13 Jun 2016 06:14:39 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.26,466,1459839600"; d="scan'208";a="1000770534" 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: <1464701638.2234.1.camel@HansenPartnership.com> 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> User-Agent: Notmuch/0.22+12~gbdd9442 (http://notmuchmail.org) Emacs/24.4.1 (x86_64-pc-linux-gnu) Date: Mon, 13 Jun 2016 13:14:36 +0300 Message-ID: <87mvmp9z03.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 Tue, 31 May 2016, James Bottomley wrote: > On Tue, 2016-05-31 at 10:51 +0300, Jani Nikula wrote: >> On Mon, 30 May 2016, James Bottomley < >> James.Bottomley@HansenPartnership.com> 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. > > Makes no discernable difference. Current parameter settings are: Sorry for the silence. Would you mind trying out drm-intel-nightly branch of [1]? BR, Jani. [1] http://cgit.freedesktop.org/drm-intel -- Jani Nikula, Intel Open Source Technology Center