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[Miroslav Zaťko <mirec.z@xxxxxxxxx>]

the problem becomes showstopper in 15.10 and 4K display on pure new
installation on Thinkpad P50

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https://bugs.launchpad.net/bugs/1379084

Title:
  After updating ubuntu using software updater built-in notebook display
  in multi-display configuration keeps showing boot screen

Status in ubuntu-drivers-common package in Ubuntu:
  New

Bug description:
  After recent update of Ubuntu 14.04LTS using software updater built-in notebook display in multi-display configuration keeps showing boot screen(or splash screen) after power-on/restart. Problem is fixed after I turn the display off and on afterwards using System Settings->Displays. I found the problem few months ago in trusty-proposed repository updates. After I uninstalled all "proposed" it was fixed again.
  Problem was moved to standard updates now.
  http://askubuntu.com/questions/490555

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: unity 7.2.2+14.04.20140714-0ubuntu1.1
  ProcVersionSignature: Ubuntu 3.13.0-36.63-generic 3.13.11.6
  Uname: Linux 3.13.0-36-generic x86_64
  NonfreeKernelModules: nvidia
  .proc.driver.nvidia.gpus.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0'
  .proc.driver.nvidia.registry: Binary: ""
  .proc.driver.nvidia.version:
   NVRM version: NVIDIA UNIX x86_64 Kernel Module  331.38  Wed Jan  8 19:32:30 PST 2014
   GCC version:  gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1)
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.14.1-0ubuntu3.5
  Architecture: amd64
  CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,staticswitcher,workarounds,scale,expo,ezoom,dbus]
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  CurrentDesktop: Unity
  Date: Thu Oct  9 03:29:57 2014
  DistUpgraded: Fresh install
  DistroCodename: trusty
  DistroVariant: ubuntu
  GraphicsCard:
   Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller])
     Subsystem: Lenovo Device [17aa:21d1]
   NVIDIA Corporation GF119M [Quadro NVS 4200M] [10de:1057] (rev a1) (prog-if 00 [VGA controller])
     Subsystem: Lenovo Device [17aa:21d1]
  InstallationDate: Installed on 2014-05-15 (146 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: LENOVO 42404JG
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-36-generic root=UUID=bdc9fa6a-b11c-4d99-a6e1-39117631e049 ro quiet splash
  SourcePackage: unity
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/26/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 8AET64WW (1.44 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 42404JG
  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:bvr8AET64WW(1.44):bd07/26/2013:svnLENOVO:pn42404JG:pvrThinkPadT520:rvnLENOVO:rn42404JG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 42404JG
  dmi.product.version: ThinkPad T520
  dmi.sys.vendor: LENOVO
  version.compiz: compiz 1:0.9.11.2+14.04.20140714-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.52-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.3-0ubuntu0.1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.3-0ubuntu0.1
  version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
  version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2.1
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3.1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1.1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
  xserver.bootTime: Thu Oct  9 01:32:04 2014
  xserver.configfile: /etc/X11/xorg.conf
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                               16562 
   vendor                                     LEN
  xserver.version: 2:1.15.1-0ubuntu2.1

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