From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754612AbcBVQKO (ORCPT ); Mon, 22 Feb 2016 11:10:14 -0500 Received: from vulcan.natalenko.name ([104.207.131.136]:17242 "EHLO vulcan.natalenko.name" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1754055AbcBVQKJ (ORCPT ); Mon, 22 Feb 2016 11:10:09 -0500 DMARC-Filter: OpenDMARC Filter v1.3.1 vulcan.natalenko.name 72CB892BBB Authentication-Results: vulcan.natalenko.name; dmarc=none header.from=natalenko.name MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Date: Mon, 22 Feb 2016 14:32:32 +0200 From: Oleksandr Natalenko To: =?UTF-8?Q?Ville_Syrj=C3=A4l=C3=A4?= Cc: Daniel Vetter , intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Daniel Vetter , Sonika Jindal , Shashank Sharma , Gary Wang Subject: Re: [REGRESSION] i915: No HDMI output with 4.4 Organization: pf-kernel developing community In-Reply-To: <20160216125409.GC32705@phenom.ffwll.local> References: <4a6e01cc374f7a120b5baab7b41f1951@natalenko.name> <20160211092639.GX23290@intel.com> <20160211140117.GC23290@intel.com> <1059a4b341fb208959a262f8706fae87@natalenko.name> <20160212232329.GS23290@intel.com> <20160215144234.GV23290@intel.com> <20160215154215.GM11240@phenom.ffwll.local> <20e547eacc03eef67541c56e85612d0c@natalenko.name> <20160216125409.GC32705@phenom.ffwll.local> Message-ID: <556cc4947b686c24989a7668922cd5c5@natalenko.name> User-Agent: Roundcube Webmail/1.2-beta Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Ville, Daniel, any additional info I could provide? I have to return dual-link DVI cable back, so let me know if I could reveal more details if necessary. Regards, Oleksandr 16.02.2016 14:54, Daniel Vetter написав: > On Tue, Feb 16, 2016 at 12:58:56PM +0200, Oleksandr Natalenko wrote: >> Ville, Daniel, >> >> I've just got another monitor and another DVI-HDMI cable, and here >> what I've >> got. >> >> ===Single Link DVI-D cable with 3 different monitors=== >> >> Computer DVI ——— DVI-D (Single Link)/HDMI cable ——— HDMI LG 23MP65HQ-P >> === >> not working > > I presume the above LG screen is what you've called previously "old > monitor"? > >> Computer DVI ——— DVI-D (Single Link)/HDMI cable ——— HDMI LG 23MP67HQ-P >> === >> not working >> Computer DVI ——— DVI-D (Single Link)/HDMI cable ——— HDMI LG 23MP55HQ-P >> === >> works! >> >> ===Dual Link DVI-D cable with monitor that doesn't work with Single >> Link >> cable=== >> >> Computer DVI ——— DVI-D (Dual Link)/HDMI cable ——— HDMI LG 23MP65HQ-P >> === >> works! > > Funky. Can you pls grab the debug logs (with the special patches from > Ville) for this case? I wonder why suddenly different cable and it > works. > > Also: Is this one of these older-ish screens where you must have a > dual-link cable to drive it at full resolution&refresh rate? > -Daniel > > >> ===Laptop with HDMI output=== >> >> Laptop HDMI ——— HDMI/HDMI cable ——— HDMI LG 23MP65HQ-P === works! >> >> I'd say that single link DVI cables are broken with new kernel, but >> one of >> monitors could work with such a cable. So I have no idea :(. >> >> Regards, >> Oleksandr. >> >> 15.02.2016 17:42, Daniel Vetter wrote: >> >The other downside is that it'll make us non-compliant, which was the >> >point of this entire ordeal: HDMI spec forbids us from starting any i2c >> >transactions when the hpd isn't signalling a present screen. >> > >> >So maybe we need to buy one of these broken screens. >> > >> >Oleksandr, what exact model are you using? And any chance that you could >> >test this on some other machine with intel gfx and latest kernel, just to >> >make sure this really is some issue with the sink and not with the machine >> >itself? And I guess you've tested with some other hdmi sink, and that >> >works?