Second GPU board (Tesla C2075) doesn't appear in the NVIDIA X Server Settings!

Dear forum members,

I’m trying to setup and use a computer system with the following hardware and software:

  • Operating System: CentOS Linux (3.10.0-327.18.2.e17.x86_64) 7
  • Motherboard X99-A BIOS version 3101
  • RAM memory: 32 GB
  • Primary graphics board: NVIDIA Ge Force GT 610
  • Secondary graphics board: NVIDIA Tesla C2075
  • NVIDIA driver version 361.42

I’m able to start the system in graphics mode using the Ge Force GT 610 as the default graphics board without any problems.

However, when I open the NVIDIA X Server Settings it shows only the first GPU board (GPU-0), i.e., the Ge Force GT 610 board.
It doesn’t show the second GPU board
(GPU-1: Tesla C2075 board)!

The following error messages appear in the Xorg.0.log:

i [drm] Failed to open DRM device for (null): -22
(EE) NVIDIA (GPU-1): Failed to initialize the NVIDIA GPU at PCI: 2:0:0
(EE) NVIDIA (GPU-1): Please check your system’s kernel log for additional error messages
(EE) NVIDIA (GPU-1): Failed to initialize the NVIDIA graphics device![/i]

Applying dmesg | grep NVRM results:

NVRM: failed to copy vbios to system memory
NVRM: RmInitAdapter failed! (0x30:0xffff:657)
NVRM: rm-init-adapter failed for device bearing minor number 0

Also, applying dmesg | grep error results:

ioapic: probe of 0000:00:05.4 failed with error -22

Additionally, invoking nvidia-smi from command prompt shows:

Unable to determine the device handle for gpu 0000:02:00:0: Insufficient Permissions

And invoking nvidia-debugdump -l shows:

No permission to talk to device 0000:02:00:0

It seems to me that there’s something restricting the access to the second GPU board (Tesla C2075), but I confess that I don’t have any idea what’s the cause of this problem…

My purpose is use the first GPU board (Ge Force GT 610) as a graphical board only and the second GPU board (Tesla C2075) just for computation (using CUDA C).

I would be extremely thankful to anyone that can explain how to fix this problem.

Best Regards from Japan,

Wilson Pardi Junior