Bug#888952: nvidia-driver and opencl

[Pascal Obry]

Hello Andreas,

Thanks for your feedback. I have just rebooted and tested as you
proposed:

First, unload is not possible as nvidia is in use.

$ sudo modprobe -r nvidia
[sudo] password for obry: 
modprobe: FATAL: Module nvidia_drm is in use.
modprobe: FATAL: Error running remove command for nvidia

$ lsmod | grep nvidia
nvidia_drm             53248  4
drm_kms_helper        192512  1 nvidia_drm
drm                   438272  7 nvidia_drm,drm_kms_helper
nvidia_modeset        860160  9 nvidia_drm
nvidia              13168640  594 nvidia_modeset

$ nvidia-modprobe -u

Let's check clinfo:

$ clinfo
Number of platforms                               0

Not working, so let's run clinfo as root:

$ sudo clinfo
Number of platforms                               1
  Platform Name                                   NVIDIA CUDA
  Platform Vendor                                 NVIDIA Corporation
  Platform Version                                OpenCL 1.2 CUDA 9.0.282
  Platform Profile                                FULL_PROFILE
  Platform Extensions                             cl_khr_global_int32_base_atomics cl_khr_global_int32_extended_atomics cl_khr_local_int32_base_atomics cl_khr_local_int32_extended_atomics cl_khr_fp64 cl_khr_byte_addressable_store cl_khr_icd cl_khr_gl_sharing cl_nv_compiler_options cl_nv_device_attribute_query cl_nv_pragma_unroll cl_nv_copy_opts cl_khr_gl_event cl_nv_create_buffer
  Platform Extensions function suffix             NV

  Platform Name                                   NVIDIA CUDA
Number of devices                                 1
  Device Name                                     Quadro M1000M
  Device Vendor                                   NVIDIA Corporation
...

All fine now. And running clinfo as user also works fine at this stage and this until I reboot.

And the permissions bits are ok:

$ ls -la /usr/bin/nvidia-modprobe
-rwsr-xr-x 1 root root 34904 Jan 13 16:43 /usr/bin/nvidia-modprobe

Please let me know if you want me to do some more testing.

This seems fishy and I can assure you that I have the same issue on two different computers.

Regards,

-- 
  Pascal Obry /  Magny Les Hameaux (78)

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