Public bug reported:

Hi,

After an update of Ubuntu 14.04 and a reboot, my second screen was not 
recognized by the laptop.
This is the second time I get this. Last time I had to re-install all my 
stuffs...

Laptop: Samsung NP900X3G
System: Ubuntu 14.04.5 LTS
Graphic card: Intel (00:02.0 VGA compatible controller: Intel Corporation 
Haswell-ULT Integrated Graphics Controller (rev 09))

Need more informations, tell me thx.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: xorg 1:7.7+1ubuntu8.1
ProcVersionSignature: Ubuntu 4.4.0-72.93~14.04.1-generic 4.4.49
Uname: Linux 4.4.0-72-generic x86_64
.tmp.unity.support.test.0:
 
ApportVersion: 2.14.1-0ubuntu3.23
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: Wed Apr 12 09:24:07 2017
DistUpgraded: Fresh install
DistroCodename: trusty
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 
09) (prog-if 00 [VGA controller])
   Subsystem: Samsung Electronics Co Ltd Device [144d:c109]
InstallationDate: Installed on 2016-04-18 (358 days ago)
InstallationMedia: Ubuntu 14.04.4 LTS "Trusty Tahr" - Release amd64 (20160217.1)
MachineType: SAMSUNG ELECTRONICS CO., LTD. 900X3G
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-72-generic 
root=UUID=5e26e584-5e80-41c8-9b69-9a0e61826dff ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/23/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P05ADU.025.140523.PS
dmi.board.asset.tag: No Asset Tag
dmi.board.name: SAMSUNG_NP1234567890
dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.board.version: SAMSUNG_SW_REVISION_1234567890ABCD
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 9
dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.chassis.version: N/A
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrP05ADU.025.140523.PS:bd05/23/2014:svnSAMSUNGELECTRONICSCO.,LTD.:pn900X3G:pvrP05ADU:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrSAMSUNG_SW_REVISION_1234567890ABCD:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvrN/A:
dmi.product.name: 900X3G
dmi.product.version: P05ADU
dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.
version.compiz: compiz 1:0.9.11.3+14.04.20160425-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.67-1ubuntu0.14.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri N/A
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core N/A
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A
xserver.bootTime: Wed Apr 12 09:23:02 2017
xserver.configfile: default
xserver.errors:
 
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id                                1495 
 vendor                                     BOE
xserver.version: 2:1.18.3-1ubuntu2.3~trusty1

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


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

** Attachment added: "Xorg latest log"
   https://bugs.launchpad.net/bugs/1682133/+attachment/4860657/+files/Xorg.0.log

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https://bugs.launchpad.net/bugs/1682133

Title:
  Dual screen is broken

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