The displayport output is physically connected to only the nvidia GPU on this generation of lenovo machines with optimus, you'll have to switch to the nvidia gpu in the bios to use it unfortunately.
** Changed in: xserver-xorg-video-intel (Ubuntu) Status: New => Won't Fix -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1058782 Title: External DisplayPort display is not recognized Status in “xserver-xorg-video-intel” package in Ubuntu: Won't Fix Bug description: Using an Intel HD Graphics 3000, I cannot have an external DisplayPort display recognized. The displays dialog won't pick it up, and neither will xrandr. ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: xserver-xorg-video-intel 2:2.20.9-0ubuntu1 ProcVersionSignature: Ubuntu 3.5.0-16.25-generic 3.5.4 Uname: Linux 3.5.0-16-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 2.5.3-0ubuntu1 Architecture: amd64 CheckboxSubmission: 7a36e5f5099f078e6a6b7c7b3aff62b9 CheckboxSystem: bb422ca46d02494cdbc459927a98bc2f 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: Sat Sep 29 17:16:23 2012 DistUpgraded: 2012-09-28 12:14:20,593 DEBUG enabling apt cron job DistroCodename: quantal DistroVariant: ubuntu DkmsStatus: bbswitch, 0.4.2, 3.5.0-16-generic, x86_64: installed nvidia-current, 304.43, 3.5.0-16-generic, x86_64: installed ExtraDebuggingInterest: Yes, if not too technical GraphicsCard: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0126] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Lenovo Device [17aa:21d1] NVIDIA Corporation GF119 [Quadro NVS 4200M] [10de:1057] (rev ff) (prog-if ff) InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) Lsusb: Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 003: ID 04f2:b217 Chicony Electronics Co., Ltd Lenovo Integrated Camera (0.3MP) MachineType: LENOVO 4239CTO ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-16-generic root=UUID=09519592-c36c-4637-9968-3e1e838feb01 ro quiet splash vt.handoff=7 SourcePackage: xserver-xorg-video-intel UpgradeStatus: Upgraded to quantal on 2012-09-28 (1 days ago) dmi.bios.date: 08/07/2012 dmi.bios.vendor: LENOVO dmi.bios.version: 8AET59WW (1.39 ) dmi.board.asset.tag: Not Available dmi.board.name: 4239CTO 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:bvr8AET59WW(1.39):bd08/07/2012:svnLENOVO:pn4239CTO:pvrThinkPadT520:rvnLENOVO:rn4239CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 4239CTO dmi.product.version: ThinkPad T520 dmi.sys.vendor: LENOVO version.compiz: compiz 1:0.9.8.2+bzr3377-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.39-0ubuntu1 version.libgl1-mesa-dri: libgl1-mesa-dri 9.0~git20120917.7cfd42ce-0ubuntu3 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 9.0~git20120917.7cfd42ce-0ubuntu3 version.xserver-xorg-core: xserver-xorg-core 2:1.13.0-0ubuntu5 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu1 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.99.99~git20120913.8637f772-0ubuntu1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.9-0ubuntu1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.2-0ubuntu2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1058782/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp