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[Bug 1170356] Re: External screen on mini-DisplayPort no longer detected

 

** Changed in: unity
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1170356

Title:
  External screen on mini-DisplayPort no longer detected

Status in Unity:
  Confirmed
Status in “unity” package in Ubuntu:
  Confirmed

Bug description:
  My laptop has a mini-DisplayPort and an HDMI port to which I can
  connect external monitors. When I plug it in into the HDMI port, it is
  properly recognised but when I plug it into the mini-DisplayPort,
  Unity fails to recognise the display. This used to work in 12.10.

  Steps to reproduce:
  1. Plug in the external display to the HDMI port via an HDMI adapter: the Unity display extends to the second monitor
  2. Plug the same display to the mini-DisplayPort adapter: the screen stay blank
  3. Open System Settings -> Displays: the external monitor is no detected.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: unity 7.0.0daily13.04.18~13.04-0ubuntu1
  ProcVersionSignature: Ubuntu 3.8.0-18.28-generic 3.8.6
  Uname: Linux 3.8.0-18-generic x86_64
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.9.2-0ubuntu8
  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
  Date: Thu Apr 18 14:37:20 2013
  DistUpgraded: 2013-03-24 16:04:44,678 DEBUG enabling apt cron job
  DistroCodename: raring
  DistroVariant: ubuntu
  DkmsStatus: virtualbox, 4.2.10: added
  GraphicsCard:
   Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0126] (rev 09) (prog-if 00 [VGA controller])
     Subsystem: Lenovo Device [17aa:21e8]
  InstallationDate: Installed on 2013-03-24 (24 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  MachineType: LENOVO 12942NG
  MarkForUpload: True
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-18-generic root=UUID=aeda5fea-792c-4b75-b1f9-572ad71afcbc ro quiet splash vt.handoff=7
  SourcePackage: unity
  UpgradeStatus: Upgraded to raring on 2013-03-24 (24 days ago)
  dmi.bios.date: 06/20/2011
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 8MET22WW (1.22 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 12942NG
  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:bvr8MET22WW(1.22):bd06/20/2011:svnLENOVO:pn12942NG:pvrThinkPadX1:rvnLENOVO:rn12942NG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 12942NG
  dmi.product.version: ThinkPad X1
  dmi.sys.vendor: LENOVO
  version.compiz: compiz 1:0.9.9~daily13.04.18.1~13.04-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.43-0ubuntu1
  version.libgl1-mesa-dri: libgl1-mesa-dri 9.1.1-0ubuntu2
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 9.1.1-0ubuntu2
  version.xserver-xorg-core: xserver-xorg-core 2:1.13.3-0ubuntu6
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2b2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.1.0-0ubuntu2
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.6-0ubuntu3
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.7-0ubuntu1
  xserver.bootTime: Thu Apr 18 13:53:57 2013
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.version: 2:1.13.3-0ubuntu6
  xserver.video_driver: intel

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