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[Tom Winterhalder <1314367@xxxxxxxxxxxxxxxxxx>]

I'm using the nvidia driver which is included in the 15.04 version:
340.76-0ubuntu1

ii  nvidia-340                                           340.76-0ubuntu1                            amd64        NVIDIA binary driver - version 340.76
ii  nvidia-340-uvm                                       340.76-0ubuntu1                            amd64        NVIDIA Unified Memory kernel module
ii  nvidia-opencl-icd-340                                340.76-0ubuntu1                            amd64        NVIDIA OpenCL ICD
ii  nvidia-prime                                         0.7                                        amd64        Tools to enable NVIDIA's Prime
ii  nvidia-settings                                      346.35-0ubuntu1                            amd64        Tool for configuring the NVIDIA graphics driver

I haven't tried any other drivers so far. What I did is try the
workaround with options.conf described in the first post. This
permanently solved the issue in older versions of Ubuntu. Now the screen
goes black and does not boot if the options are enabled.

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https://bugs.launchpad.net/bugs/1314367

Title:
  Flickering with Ubuntu 14.04 and nvidia card reappeared

Status in xorg package in Ubuntu:
  Incomplete

Bug description:
  As requested in Bug #1310633 I'm opening a new bug.

  With a previous version of Ubuntu I already had this flickering. With
  additional options for the kernel module I was able to fix the
  flickering.

  options nvidia NVreg_RegistryDwords="PerfLevelSrc=0x2222"
  NVreg_Mobile=3 NVreg_ModifyDeviceFiles=0

  With version 14.04 and the nvidia-331 (331.38-0ubuntu7) driver the
  flickering reappeared although the line is still present in
  options.conf.

  Using modprobe --resolve-alias nvidia I found the correct driver
  module name which in my case is nvidia_331. Changing the module name
  in options.conf to nvidia_331 X doesn't start anymore. Removing the
  NVreg_ModifyDeviceFiles option X is starting again, but does not solve
  the issue.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: xorg 1:7.7+1ubuntu8
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-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
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: None
  CurrentDesktop: Unity
  Date: Tue Apr 29 21:09:41 2014
  DistUpgraded: 2014-04-17 23:47:50,572 DEBUG enabling apt cron job
  DistroCodename: trusty
  DistroVariant: ubuntu
  DkmsStatus:
   bbswitch, 0.7, 3.13.0-24-generic, x86_64: installed
   nvidia-331, 331.38, 3.13.0-24-generic, x86_64: installed
   vboxhost, 4.3.10, 3.13.0-24-generic, x86_64: installed
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   NVIDIA Corporation GT215GLM [Quadro FX 1800M] [10de:0cbc] (rev a2) (prog-if 00 [VGA controller])
     Subsystem: Hewlett-Packard Company Device [103c:1521]
  InstallationDate: Installed on 2012-11-17 (528 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  MachineType: Hewlett-Packard HP EliteBook 8540w
  PccardctlStatus:
   Socket 0:
     3.3V
    16-bit
    PC Card
     Subdevice 0 (function 0) bound to driver "pata_pcmcia"
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=c6af930a-63f1-4015-9c42-bdde793e3e5a ro quiet splash
  SourcePackage: xorg
  UpgradeStatus: Upgraded to trusty on 2014-04-17 (11 days ago)
  dmi.bios.date: 09/13/2013
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: 68CVD Ver. F.24
  dmi.board.name: 1521
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: KBC Version 32.35
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvr68CVDVer.F.24:bd09/13/2013:svnHewlett-Packard:pnHPEliteBook8540w:pvr:rvnHewlett-Packard:rn1521:rvrKBCVersion32.35:cvnHewlett-Packard:ct10:cvr:
  dmi.product.name: HP EliteBook 8540w
  dmi.sys.vendor: Hewlett-Packard
  version.compiz: compiz 1:0.9.11+14.04.20140409-0ubuntu1
  version.ia32-libs: ia32-libs 20090808ubuntu36
  version.libdrm2: libdrm2 2.4.52-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.0-4ubuntu5
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.0-4ubuntu5
  version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
  version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2
  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: Tue Apr 29 21:06:04 2014
  xserver.configfile: default
  xserver.errors: open /dev/fb0: No such file or directory
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   
  xserver.version: 2:1.15.1-0ubuntu2

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