From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrey Skvortsov Subject: Re: WARNING: at drivers/gpu/drm/i915/intel_display.c:11375 [i915] in 3.19-rc2 Date: Sat, 3 Jan 2015 19:54:59 +0300 Message-ID: <20150103165459.GA3020@yulia-desktop> References: <20150101142215.GA2570@yulia-desktop> <87bnmh1vee.fsf@intel.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1094594834==" Return-path: In-Reply-To: <87bnmh1vee.fsf@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Jani Nikula Cc: David Airlie , Daniel Vetter , intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org --===============1094594834== Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="G4iJoqBmSsgzjUCe" Content-Disposition: inline --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-- --===============1094594834== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KSW50ZWwtZ2Z4 IG1haWxpbmcgbGlzdApJbnRlbC1nZnhAbGlzdHMuZnJlZWRlc2t0b3Aub3JnCmh0dHA6Ly9saXN0 cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9pbnRlbC1nZngK --===============1094594834==--