From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?iso-8859-1?q?Hans-J=FCrgen_Koch?= Subject: Re: Matrox G550, dual head, 1680x1050 Date: Fri, 2 Mar 2007 00:49:54 +0100 Message-ID: <200703020049.55005.hjk@linutronix.de> References: <200703020025.13174.hjk@linutronix.de> Reply-To: linux-fbdev-devel@lists.sourceforge.net Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Return-path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.92] helo=mail.sourceforge.net) by sc8-sf-list1-new.sourceforge.net with esmtp (Exim 4.43) id 1HMv27-00055g-So for linux-fbdev-devel@lists.sourceforge.net; Thu, 01 Mar 2007 15:50:39 -0800 Received: from www.osadl.org ([213.239.205.134] helo=mail.tglx.de) by mail.sourceforge.net with esmtp (Exim 4.44) id 1HMv27-0001cI-Cj for linux-fbdev-devel@lists.sourceforge.net; Thu, 01 Mar 2007 15:49:59 -0800 In-Reply-To: Content-Disposition: inline List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-fbdev-devel-bounces@lists.sourceforge.net Errors-To: linux-fbdev-devel-bounces@lists.sourceforge.net To: linux-fbdev-devel@lists.sourceforge.net Cc: Alex Deucher Am Freitag, 2. M=E4rz 2007 00:29 schrieb Alex Deucher: > On 3/1/07, Hans-J=FCrgen Koch wrote: > > Hi, > > I'm the proud owner of two NEC MultiSync 2070WNX monitors (1680x1050) a= nd > > a Matrox G550 dual DVI card. I'm now trying to set up a dual head > > configuration with this equipment. > > > > I'm booting with video=3Dmatroxfb:vesa:0x1BB, as there is no 1680x1050 = vesa > > mode. This works, both monitors show the same and complain about the > > wrong resolution. > > > > Now I start my X server (xorg.conf below) and wish to get a xinerama > > setup. Monitor 1 switches to 1680x1050 and shows a nice clean screen. > > Monitor 2 seems to have problems, though. I guess the card still outputs > > the 1280x1024 set up at boot time. Colours are correct, but the image is > > heavily distorted. It looks like the X server thinks it's 1680x1050 but > > in fact it's still 1280x1024. > > > > I spent some time googling, but to no avail. Now my questions: > > > > Is this a known limitation of matroxfb? > > If yes, is it considered a bug? I could spend some time looking into the > > code. Do I have any chance to get this working in a reasonable dual head > > configuration? Any hints? > > IIRC, the current mga X server doesn't know how to deal with DVI > (single or dual ports). DVI was only supported with matrox' binary > module. > Hi Alex, thanks for your fast reply. Currently, I've got both monitors connected with VGA cables. The card has s= ome = proprietary 60-pin or so connector, and I've got an adapter caple from that = plug to 2xVGA. Both monitors show a stable picture, but only the picture on = monitor #1 is usable. It really looks like the X server is trying to switch = both channels to 1680x1050, but only succeeds with the first one. Hans ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=3Djoin.php&p=3Dsourceforge&CID=3DDE= VDEV