From mboxrd@z Thu Jan 1 00:00:00 1970 From: Carsten Emde Subject: Re: [PATCH 2/3] drivers-gpu-drm-add-disable-enable-connector.patch Date: Sun, 11 Mar 2012 21:46:11 +0100 Message-ID: <4F5D0F13.2010204@osadl.org> References: <20120310202014.828058552@osadl.org> <20120310202242.384865299@osadl.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org To: Dave Airlie Cc: David Airlie , Thomas Gleixner , DRI , LKML List-Id: dri-devel@lists.freedesktop.org On 03/11/2012 08:20 AM, Dave Airlie wrote: > On Sat, Mar 10, 2012 at 8:20 PM, Carsten Emde wrote: >> Some recent integrated graphics chipset, notably Intel's "Pineview", also >> provide on-chip LVDS support. As an extra service, the LVDS interface supplies >> EDID data - irrespective of whether an LVDS panel is connected or not. The >> drm_mode_getresources() function, therefore, causes Xorg to always include >> the LVDS panel into the display and initialize a separate screen for it. e.g. >> (II) intel(0): Output LVDS1 connected >> (II) intel(0): Output VGA1 connected >> (II) intel(0): Using spanning desktop for initial modes >> (II) intel(0): Output LVDS1 using initial mode 1024x768 +0+0 >> (II) intel(0): Output VGA1 using initial mode 1280x1024 +1024+0 >> which is not what you want, if the only connected screen is a VGA monitor. >> One would assume that the BIOS settings of such systems would allow to >> separately enable or disable LVDS support; unfortunately, systems have been >> found in the wild that do not provide this feature. > > So video=LVDS-1:d doesn't work for you? Oops, yes, you are totally right. By some reason, I overlooked this option. I tried two systems that need forced disabling and enabling with video=LVDS-1:d video=VGA-1:e which worked perfectly well. So please skip this patch, sorry for the noise. Thanks, -Carsten.