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[Alberto Milone <alberto.milone@xxxxxxxxxxxxx>]

The log didn't report any problems, and the GPU was correctly detected
and configured. What problem are you experiencing? Also please attach
your /var/log/Xorg.0.log and the dmesg output

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https://bugs.launchpad.net/bugs/1448593

Title:
  gpu-manager cannot find Nvidia gpu

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

Bug description:
  On Ubuntu 15.04, gpu manager cannot find my gpu. I have a Nvidia gtx
  760 and am using the proprietary drivers (346-updates)

  output of systemctl status gpu-manager.service:
  ● gpu-manager.service - Detect the available GPUs and deal with any system changes
     Loaded: loaded (/lib/systemd/system/gpu-manager.service; enabled; vendor preset: enabled)
     Active: inactive (dead) since Sat 2015-04-25 10:56:48 CDT; 26min ago
    Process: 670 ExecStart=/usr/bin/gpu-manager --log /var/log/gpu-manager.log (code=exited, status=0/SUCCESS)
   Main PID: 670 (code=exited, status=0/SUCCESS)

  Apr 25 10:56:47 knil-PC systemd[1]: Starting Detect the available GPUs and deal with any system changes...
  Apr 25 10:56:47 knil-PC gpu-manager[670]: /etc/modprobe.d is not a file
  Apr 25 10:56:47 knil-PC gpu-manager[670]: /etc/modprobe.d is not a file
  Apr 25 10:56:47 knil-PC gpu-manager[670]: /etc/modprobe.d is not a file
  Apr 25 10:56:47 knil-PC gpu-manager[670]: /etc/modprobe.d is not a file
  Apr 25 10:56:48 knil-PC gpu-manager[670]: update-alternatives: error: no alternatives for x86_64-linux-gnu_gfxcore_conf
  Apr 25 10:56:48 knil-PC systemd[1]: Started Detect the available GPUs and deal with any system changes.

  also, I'm not sure if it's connected but this is a line in journctl :
  Apr 25 10:56:47 knil-PC nvidia-persistenced[485]: Failed to query
  NVIDIA devices. Please ensure that the NVIDIA device files
  (/dev/nvidia*) exist, and that user 117 has read and write permissions
  for those files. user 117 is nvidia-persistenced, the device files do
  exist, and it should be able to access them.

  Edit: The problem still persists. contents of /var/log/gpu-manager.log

  log_file: /var/log/gpu-manager.log
  last_boot_file: /var/lib/ubuntu-drivers-common/last_gfx_boot
  new_boot_file: /var/lib/ubuntu-drivers-common/last_gfx_boot
  grep dmesg status 256
  dmesg status 256 == 0? No
  Is nvidia loaded? yes
  Was nvidia unloaded? no
  Is nvidia blacklisted? no
  Is fglrx loaded? no
  Was fglrx unloaded? no
  Is fglrx blacklisted? no
  Is intel loaded? no
  Is radeon loaded? no
  Is radeon blacklisted? no
  Is nouveau loaded? no
  Is nouveau blacklisted? yes
  Is fglrx kernel module available? no
  Is nvidia kernel module available? yes
  Vendor/Device Id: 10de:1187
  BusID "PCI:1@0:0:0"
  Is boot vga? yes
  Skipping "/dev/dri/card0", driven by "nvidia-drm"
  Skipping "/dev/dri/card0", driven by "nvidia-drm"
  Skipping "/dev/dri/card0", driven by "nvidia-drm"
  Does it require offloading? no
  last cards number = 1
  Has amd? no
  Has intel? no
  Has nvidia? yes
  How many cards? 1
  Has the system changed? No
  main_arch_path x86_64-linux-gnu, other_arch_path i386-linux-gnu
  Current alternative: /usr/lib/nvidia-346/ld.so.conf
  Current core alternative: (null)
  Is nvidia enabled? yes
  Is fglrx enabled? no
  Is mesa enabled? no
  Is pxpress enabled? no
  Is prime enabled? no
  Is nvidia available? yes
  Is fglrx available? no
  Is fglrx-core available? no
  Is mesa available? yes
  Is pxpress available? no
  Is prime available? yes
  Single card detected
  Driver is already loaded and enabled
  Nothing to do
  No change - nothing to do

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