Public bug reported:

X1 Carbon 2014 model (20A7CTO1WW)
Thinkpad Onelink Pro dock (4X10E52935)
Dell U3011 30 inch monitor (native resolution: 2560x1600), connected to 
displayport on Onelink pro dock
Installed Ubuntu 14.04 (beta)
 
Max resolution on U3011 I can get is 1920x1440 right now.
 
Tried on Win 8.1 pro (dual boot), works fine at  2560x1600.
Tried the mini displayport on X1, works fine as well.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: xorg 1:7.7+1ubuntu8
ProcVersionSignature: Ubuntu 3.13.0-23.45-generic 3.13.8
Uname: Linux 3.13.0-23-generic x86_64
.tmp.unity.support.test.0:
 
ApportVersion: 2.14.1-0ubuntu1
Architecture: amd64
CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Thu Apr 10 12:02:48 2014
DistUpgraded: Fresh install
DistroCodename: trusty
DistroVariant: ubuntu
GraphicsCard:
 Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 
0b) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:2218]
InstallationDate: Installed on 2014-04-04 (5 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Beta amd64 (20140326)
MachineType: LENOVO 20A7CTO1WW
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-23-generic.efi.signed 
root=UUID=aa3a0809-4d57-42b1-bdbc-8eae27a9cde2 ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/13/2014
dmi.bios.vendor: LENOVO
dmi.bios.version: GRET30WW (1.07 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20A7CTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0E50510 Pro
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: 
dmi:bvnLENOVO:bvrGRET30WW(1.07):bd01/13/2014:svnLENOVO:pn20A7CTO1WW:pvrThinkPadX1Carbon2nd:rvnLENOVO:rn20A7CTO1WW:rvrSDK0E50510Pro:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 20A7CTO1WW
dmi.product.version: ThinkPad X1 Carbon 2nd
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.11+14.04.20140409-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.52-1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.0-4ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.0-4ubuntu2
version.xserver-xorg-core: xserver-xorg-core 2:1.15.0-1ubuntu7
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 Apr 10 09:27:26 2014
xserver.configfile: default
xserver.errors:
 
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id                                1048 
 vendor                                     LGD
xserver.version: 2:1.15.0-1ubuntu7

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug compiz-0.9 trusty ubuntu

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https://bugs.launchpad.net/bugs/1307623

Title:
  new X1 Carbon 2014 + Onelink Pro dock + 30inch monitor: no native
  resolution

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