From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752092AbbACQzI (ORCPT ); Sat, 3 Jan 2015 11:55:08 -0500 Received: from mail-lb0-f175.google.com ([209.85.217.175]:55313 "EHLO mail-lb0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751036AbbACQzE (ORCPT ); Sat, 3 Jan 2015 11:55:04 -0500 From: Andrey Skvortsov X-Google-Original-From: Andrey Skvortsov Date: Sat, 3 Jan 2015 19:54:59 +0300 To: Jani Nikula Cc: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, David Airlie , Daniel Vetter Subject: Re: WARNING: at drivers/gpu/drm/i915/intel_display.c:11375 [i915] in 3.19-rc2 Message-ID: <20150103165459.GA3020@yulia-desktop> Mail-Followup-To: Andrey Skvortsov , Jani Nikula , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, David Airlie , Daniel Vetter References: <20150101142215.GA2570@yulia-desktop> <87bnmh1vee.fsf@intel.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="G4iJoqBmSsgzjUCe" Content-Disposition: inline In-Reply-To: <87bnmh1vee.fsf@intel.com> X-PGP-Key: fp="21AF 2E6F 04EC 7E11 21C6 E399 2236 2F26 57A3 AEAD"; id="0x57A3AEAD"; get=; User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --G4iJoqBmSsgzjUCe Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Jan 02, 2015 at 09:42:01AM +0200, Jani Nikula wrote: > On Thu, 01 Jan 2015, Andrey Skvortsov wrote: > > Hi, > > > > this warning does not exist in 3.19-rc1, but it happens every boot in > > 3.19-rc2. If you need any other information or data, I would be glad > > to help to debug it. >=20 > Hmm, at a glance I can't find a commit that could be the culprit. Can > you bisect between rc1 and rc2 to find the bad commit? Sorry, my first message was not fully correct. As I tested this more, it happens unfortunately not every boot. And this is not a regression, because it happened couple of times with 3.19-rc1 too. This warning seems to depend on the previously booted kernel. If I boot the same kernel every time, it occurs very seldom. To reproduce the warning I booted v3.19-rc2 and v3.19-rc1-g08b022a965 one after another many times. In this case the warning happens with probability aroun= d 50%. > > [ 12.848428] ------------[ cut here ]------------ > > [ 12.848479] WARNING: CPU: 1 PID: 328 at drivers/gpu/drm/i915/intel_d= isplay.c:11375 intel_crtc_set_config+0x3de/0xb36 [i915]() > > [ 12.848482] WARN_ON(!set->fb && (set->num_connectors !=3D 0)) --=20 Best regards, Andrey Skvortsov Secure e-mail with gnupg: See http://www.gnupg.org/ PGP Key ID: 0x57A3AEAD --G4iJoqBmSsgzjUCe Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIcBAEBCgAGBQJUqB7jAAoJEAF8y6L1SLCtePAP/Rb4Qv/7JNhpEOtOkSo0l43G ejFd/j9BE41R0guaM5G0VfwUo79yp3S9BmHSPOH/ExYSt8Z1cQ1loLYomKPyNkFV /1HBochlU8OHn2GIUjH5KIa/IlmN+aQJ2FwKTmBg6PRfPeUHEp/0/MWNBSUPfMRv 59/EAjV920WpG++tf1yzSARJQw1Ok21GWueSnOAe2z1gUCL8wS/nAO9CmKaVJISp kOnm3cDYDnEjqj5tcCJCfGQEl9bKhIe5rCCIKnUfyKSmd7FAqAaw83L+CvOlg4Kt U2ZTM7y/rn/Eh0Pj9on/6wxdmRjWItpvxcW6bv824oEFWlnYGdJutiqO3HIGMLSX jY2Pjz1EtgN18peAhb70IxnYlYsGM7jQN2IfxU0DvRpC45r77hpYQVc3Pgwb8SqQ gFYXzRRj9Cn4UarV7FJCKCd//Ag3OKnbB0or33hw7WXyllCeFBfGLqrFbkLKy4sv oNAY3quGK1+/M2HtNUboqynJ90MAfLQS9rWKaFxY2AGeI1P+8dzkQaprjf8lWX3C it//fdI63DTJp3eKQr7SbvcHUeNXAm1LaHIoINAYgXRDRiG6i9rpEUNJm24y/YA6 tleLqclmKTiPLdC8T7ZjaE1qA/fAVGfJtmDb33URwaJV099y/OESKNWI7ynGs+O6 xSh1JnrBCNAob1Poedrm =xOhg -----END PGP SIGNATURE----- --G4iJoqBmSsgzjUCe--