From owner-freebsd-x11@freebsd.org  Sat Feb  6 00:48:26 2016
Return-Path: <owner-freebsd-x11@freebsd.org>
Delivered-To: freebsd-x11@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id C81AAA9E6CE
 for <freebsd-x11@mailman.ysv.freebsd.org>;
 Sat,  6 Feb 2016 00:48:26 +0000 (UTC)
 (envelope-from jean-sebastien.pedron@dumbbell.fr)
Received: from mail.made4.biz (mail.made4.biz [IPv6:2001:41d0:2:c018::1:3])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id 98E781E79
 for <freebsd-x11@freebsd.org>; Sat,  6 Feb 2016 00:48:26 +0000 (UTC)
 (envelope-from jean-sebastien.pedron@dumbbell.fr)
Received: from [176.158.145.63] (helo=[192.168.75.14])
 by mail.made4.biz with esmtpsa (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128)
 (Exim 4.86 (FreeBSD))
 (envelope-from <jean-sebastien.pedron@dumbbell.fr>)
 id 1aRr32-0005q4-7s
 for freebsd-x11@freebsd.org; Sat, 06 Feb 2016 01:48:24 +0100
Subject: Re: drm-i915-update-38, no output on high resolution display
To: freebsd-x11@freebsd.org
References: <20160119103527.GA59551@seth>
From: =?UTF-8?Q?Jean-S=c3=a9bastien_P=c3=a9dron?=
 <jean-sebastien.pedron@dumbbell.fr>
Message-ID: <56B542D7.60409@dumbbell.fr>
Date: Sat, 6 Feb 2016 01:48:23 +0100
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:38.0)
 Gecko/20100101 Thunderbird/38.5.1
MIME-Version: 1.0
In-Reply-To: <20160119103527.GA59551@seth>
Content-Type: text/plain; charset=windows-1252
Content-Transfer-Encoding: 8bit
X-BeenThere: freebsd-x11@freebsd.org
X-Mailman-Version: 2.1.20
Precedence: list
List-Id: X11 on FreeBSD -- maintaining and support <freebsd-x11.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-x11>,
 <mailto:freebsd-x11-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-x11/>
List-Post: <mailto:freebsd-x11@freebsd.org>
List-Help: <mailto:freebsd-x11-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-x11>,
 <mailto:freebsd-x11-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 06 Feb 2016 00:48:26 -0000

Le 19/01/2016 11:35, Stefan Grundmann via freebsd-x11 a écrit :
> during testing on a Lenovo Thinkpad W541 (20EF0020GE: Core 
> i7-4910QM, NVIDIA Quadro K2100M optimus) i found that after commit
> 72bb3b3f9dcaf573be532ced9043eb59dedf21df "drm/i915: set
> TRANSCODER_EDP even earlier", kldload i915kms results in a blank
> internal display (eDP1, 2880x1620).
> 
> reverting 72bb3b3f9dcaf573be532ced9043eb59dedf21df make the output 
> work again on all tested revisions.

Hi!

Thank you for tracking this problem down!

An issue was created on GitHub:
https://github.com/freebsd/freebsd-base-graphics/issues/4

I have a similar problem with an UltraHD monitor plugged to a Haswell
desktop and I get a blank screen when using the native resolution.
FullHD works.

-- 
Jean-Sébastien Pédron