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[Bryan Quigley <bryan.quigley@xxxxxxxxxxxxx>]

Thanks to carlesa25's last post on this thread - https://devtalk.nvidia.com/default/topic/734098/linux/-boinc-ubuntu-nvidia-no-usable-gpus-found-/. .. 
I found that installing the nvidia-modprobe results in BOINC detecking GPUs again.   

I'm not entirely sure why this works - AFAICT the modules we're being
built fine before this.

@birdstream does this work for you as well?

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https://bugs.launchpad.net/bugs/1320990

Title:
  [xorg-edgers] BOINC can't find CUDA driver with xorg-edgers packages

Status in “xorg” package in Ubuntu:
  Confirmed

Bug description:
  Running Ubuntu 14.04 with Xorg Edgers and a Geforce 750 Ti.
  Installed nvidia-337,-dev,-uvm, libcuda1-337.  With these packages
  from xorg-edgers everything graphical/game/etc wise runs perfectly,
  except for CUDA though BOINC.

  When installed directly from nvidia's website CUDA worked fine in
  BOINC.

  Now BOINC just says missing GPU type NVIDIA (generally it looks for
  CUDA, but OpenCL doesn't appear to work either).

  I have not had it working on any previous version of xorg-edgers (just
  got the GPU recently).

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: xorg 1:7.7+1ubuntu8
  ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  NonfreeKernelModules: nvidia
  .proc.driver.nvidia.registry: Binary: ""
  .proc.driver.nvidia.version:
   NVRM version: NVIDIA UNIX x86_64 Kernel Module  337.19  Tue Apr 29 19:58:58 PDT 2014
   GCC version:  gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1)
  ApportVersion: 2.14.1-0ubuntu3.1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Mon May 19 15:08:56 2014
  DistUpgraded: Fresh install
  DistroCodename: trusty
  DistroVariant: ubuntu
  DkmsStatus:
   bbswitch, 0.7, 3.13.0-24-generic, x86_64: installed
   nvidia-337, 337.19, 3.13.0-24-generic, x86_64: installed
   nvidia-337-uvm, 337.19, 3.13.0-24-generic, x86_64: installed
   virtualbox, 4.3.10, 3.13.0-24-generic, x86_64: installed
  GraphicsCard:
   NVIDIA Corporation GM107 [GeForce GTX 750 Ti] [10de:1380] (rev a2) (prog-if 00 [VGA controller])
     Subsystem: eVga.com. Corp. Device [3842:3751]
  InstallationDate: Installed on 2014-04-27 (21 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  LightdmGreeterLog:
   ** (lightdm-gtk-greeter:3637): WARNING **: Failed to load user image: Failed to open file '/home/bryan/.face': No such file or directory
   
   (lightdm-gtk-greeter:3637): Gdk-WARNING **: lightdm-gtk-greeter: Fatal IO error 11 (Resource temporarily unavailable) on X server :0.
  LightdmGreeterLogOld:
   ** (lightdm-gtk-greeter:2089): WARNING **: Failed to load user image: Failed to open file '/home/bryan/.face': No such file or directory
   g_dbus_connection_real_closed: Remote peer vanished with error: Underlying GIOStream returned 0 bytes on an async read (g-io-error-quark, 0). Exiting.
  MachineType: BIOSTAR Group TA890GXE
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=a391c643-63e1-42cd-938c-6565a0fad31f ro quiet splash
  SourcePackage: xorg
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 05/30/2011
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 080015
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: TA890GXE
  dmi.board.vendor: BIOSTAR Group
  dmi.chassis.asset.tag: None
  dmi.chassis.type: 3
  dmi.chassis.vendor: BIOSTAR Group
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr080015:bd05/30/2011:svnBIOSTARGroup:pnTA890GXE:pvr:rvnBIOSTARGroup:rnTA890GXE:rvr:cvnBIOSTARGroup:ct3:cvr:
  dmi.product.name: TA890GXE
  dmi.sys.vendor: BIOSTAR Group
  version.compiz: compiz 1:0.9.11+14.04.20140423-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.54+git20140505.5126fcb2-0ubuntu0ricotz~trusty
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.3.0~git20140515.67041874-0ubuntu0sarvatt~trusty
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.3.0~git20140515.67041874-0ubuntu0sarvatt~trusty
  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 1:7.3.99+git20140505.be1469cc-0ubuntu0ricotz~trusty
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.911+git20140507.18416b51-0ubuntu0ricotz~trusty
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10+git20140220.480f0998-0ubuntu0sarvatt
  xserver.bootTime: Sat May 17 09:38:52 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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