From mboxrd@z Thu Jan 1 00:00:00 1970 From: Keith Packard Subject: Re: 3.0 (or SNA?) regression: failed to train DP, aborting Date: Sun, 24 Jul 2011 21:54:52 -0700 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1364815729==" Return-path: Received: from keithp.com (home.keithp.com [63.227.221.253]) by gabe.freedesktop.org (Postfix) with ESMTP id 382389E961 for ; Sun, 24 Jul 2011 21:54:56 -0700 (PDT) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org Errors-To: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org To: Andrew Lutomirski , intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org --===============1364815729== Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha1; protocol="application/pgp-signature" --=-=-= Content-Transfer-Encoding: quoted-printable On Sat, 23 Jul 2011 14:40:36 -0400, Andrew Lutomirski wrote: > I have a Q67 (DQ67SW board) attached to a Dell U2711 via DP. In > previous kernels, the DP link has worked flawlessly. I just booted > 3.0-final and simultaneously enabled SNA, and now when my screen goes > to sleep I don't get an image back until I power cycle the monitor. > dmesg says: >=20 > [drm:intel_dp_complete_link_train] *ERROR* failed to train DP, > aborting Jesse put together a set of 7 display port patches around July 7 which were merged just after 3.0-rc6. If you try 3.0-rc6 and find that it works, you should be able to bisect that really quickly; there are only 13 patches post-rc6 in drivers/gpu/drm/i915: $ git bisect start v3.0 v3.0-rc6 -- drivers/gpu/drm/i915 We tested this on as many machines as we could get our hands on, but it's a combinatorial problem between the chipset and the monitor... > I don't know whether this is a 3.0 regression or whether it's > triggered by SNA, but something broke. Yeah, as you noticed, this should have no effect. Please let us know what you find. =2D-=20 keith.packard@intel.com --=-=-= Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iD8DBQFOLPccQp8BWwlsTdMRApP9AKCwo8uydezlRglDY8cE9upV4NTO/wCgpLZd pfJOhSk+XwDqp1r+JCr+gR4= =GQzG -----END PGP SIGNATURE----- --=-=-=-- --===============1364815729== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx --===============1364815729==--