From mboxrd@z Thu Jan 1 00:00:00 1970 From: dann frazier Subject: regression bisected: display sync drops after 7221fc33 Date: Mon, 25 Jan 2016 09:35:26 -0700 Message-ID: <20160125163526.GA3389@fluid.dannf> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1395946217==" Return-path: Received: from complete.lackof.org (complete.lackof.org [198.49.126.79]) by gabe.freedesktop.org (Postfix) with ESMTPS id 8AB506E4C2 for ; Mon, 25 Jan 2016 08:41:31 -0800 (PST) List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Matt Roper Cc: Daniel Vetter , intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org --===============1395946217== Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="Nq2Wo0NMKNjxTN9z" Content-Disposition: inline --Nq2Wo0NMKNjxTN9z Content-Type: text/plain; charset=us-ascii Content-Disposition: inline I've got a Lenovo T410 w/ an external display (DisplayPort<->HDMI). After upgrading from a 4.2 kernel to a 4.3, I started hitting an issue where the display thinks it has lost input for a few moments. Oddly, it usually happens when I start typing in a terminal after a short period of inactivity. I see no OS-side symptoms - there are no new messages in dmesg/syslog/Xorg log, etc. I reproduced with latest Linus master (@ 3e1e21c7b), and then bisected down to the following commit: commit 7221fc333dbe1743a3dff155b03527fda90d4ec1 Author: Matt Roper Date: Thu Sep 24 15:53:08 2015 -0700 drm/i915: Eliminate usage of pipe_wm_parameters from ILK-style WM (v2) --Nq2Wo0NMKNjxTN9z Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBAgAGBQJWpk7OAAoJEBv4PF5U/IZAPQMP/jm8/IXBcmDBYmSUltpQ5vZz ekl4CwQqMHepF/TlL+kTbema1drN2HFa+kjv8hU8SyUeGMOqf2MhBWZAO24zSIfm pveCC0F38M0hHQYAUZ7VeJwO2EGuPb3K+3xtlTeGBPA6Y/mhlaZ2o2oi43/Vu30v x/yNzfndZLw4jxTBHSF2AYYQdsHMvQlZqvP3AQb/XrvskZmdrKOwg5PSsUbJ0y2W NWcVCGqnYLBkT89jps0H6bdU68eozZWWhBDNJFmCoTbojV2F3bB0XuS+WhULt4ux xBIGoK/JbfJwYiNN1TqIsKCtkk/5s6Vu7vFxOGcFXxNnOkGHZKb1lIOIZnng5Cdd dVKI0a+1VX+jDegVixuLTnKic0h9gc7b6RB7w+Oqhhsovehx0ZYPty6zHq/aOw5N +8s/xdj8S0Gjzsq2RdlODcEcw5ehIvFbfCd2WhIVDwPXCDiUXsFRH16Q0yGU5Xcp IDYB+2Fg8rE6Icgbn7TgvxgM94pjgskeODa1HqPQE+tkvxsDZp3g1kSntH8QQ90R lOszgFeL+6wzYNtufhXUmQrjJ5gngNf06OdwnJqhG6GAQsxIaq4CyoAkurVjbGnW 0eI+YryM1gYiS/dVkizZZJxcivAzWk1p++PUojW6QKkkvoWNB/JO3Nk6MUhfQJey eN01SZXJ7YCGKj3NprGf =VB+a -----END PGP SIGNATURE----- --Nq2Wo0NMKNjxTN9z-- --===============1395946217== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KSW50ZWwtZ2Z4 IG1haWxpbmcgbGlzdApJbnRlbC1nZnhAbGlzdHMuZnJlZWRlc2t0b3Aub3JnCmh0dHA6Ly9saXN0 cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9pbnRlbC1nZngK --===============1395946217==--