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[Launchpad Bug Tracker <1292036@xxxxxxxxxxxxxxxxxx>]

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Hi,
I'm trying to connect an external screen to my thinkpad T420s. I'm running Ubuntu 14.04 and here is the output of xrandr:

$ xrandr
Screen 0: minimum 320 x 200, current 1600 x 900, maximum 32767 x 32767
LVDS1 connected primary 1600x900+0+0 (normal left inverted right x axis y axis) 309mm x 174mm
   1600x900       60.0*+   40.0  
   1440x900       59.9  
   1360x768       59.8     60.0  
   1152x864       60.0  
   1024x768       60.0  
   800x600        60.3     56.2  
   640x480        59.9  
VGA1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)

LVDS1 is the LCD-display on the laptop. This is the output of lspci:

$ lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
01:00.0 VGA compatible controller: NVIDIA Corporation GF119M [NVS 4200M] (rev ff)

The screen recognises that something is plugged into the DisplayPort but
Ubuntu is unable to send output to it. It's probably related to the
whole dual graphics card thing.

Thank you for reading this bug!

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: xorg 1:7.7+1ubuntu8
ProcVersionSignature: Ubuntu 3.13.0-16.36-generic 3.13.5
Uname: Linux 3.13.0-16-generic i686
ApportVersion: 2.13.3-0ubuntu1
Architecture: i386
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
CompositorRunning: None
Date: Thu Mar 13 15:32:36 2014
DistUpgraded: 2014-02-24 23:10:48,392 DEBUG enabling apt cron job
DistroCodename: trusty
DistroVariant: ubuntu
EcryptfsInUse: Yes
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0126] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:21d3]
 NVIDIA Corporation GF119M [NVS 4200M] [10de:1056] (rev ff) (prog-if ff)
InstallationDate: Installed on 2013-08-07 (217 days ago)
InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release i386 (20130213)
MachineType: LENOVO 4174PEG
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=sv_SE.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-16-generic root=UUID=7d44dac8-470f-4bb6-a331-e31a6e61ea51 ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: Upgraded to trusty on 2014-02-24 (16 days ago)
dmi.bios.date: 11/01/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 8CET50WW (1.30 )
dmi.board.asset.tag: Not Available
dmi.board.name: 4174PEG
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr8CET50WW(1.30):bd11/01/2011:svnLENOVO:pn4174PEG:pvrThinkPadT420s:rvnLENOVO:rn4174PEG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 4174PEG
dmi.product.version: ThinkPad T420s
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.11+14.04.20140305-0ubuntu1
version.libdrm2: libdrm2 2.4.52-1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.0~rc3-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.0~rc3-0ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.15.0-1ubuntu6
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
xserver.bootTime: Thu Mar 13 14:44:03 2014
xserver.configfile: default
xserver.errors: Failed to load module "nvidia" (module does not exist, 0)
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id                                8510 
 vendor                                     AUO
xserver.version: 2:1.15.0-1ubuntu6

** Affects: linux (Ubuntu)
     Importance: Medium
         Status: Incomplete


** Tags: apport-bug i386 latest-bios-1.39 trusty ubuntu wily
-- 
Displayport on Thinkpad T420s is not usable
https://bugs.launchpad.net/bugs/1292036
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