Posted by tinkerthinker on Jun 22, 2016; 8:51am
URL: https://forum.jogamp.org/CL-DEVICE-NOT-AVAILABLE-when-creating-CLContext-with-64-bit-Java-on-GTX-970-tp4036560p4036841.html

I've been trying to solve this problem myself.  I've tried lots of things, and am finally making progress by following these steps:
http://streamcomputing.eu/wp-content/uploads/kalins-pdf/singles/install-opencl-on-debianubuntu-orderly.pdf

Specifically:
1) do:
  echo "/usr/local/cuda/lib64" > /etc/ld.so.conf.d/opencl-vendor-nvidia.conf
  echo "/usr/local/cuda/lib" >> /etc/ld.so.conf.d/opencl-vendor-nvidia.conf

then run:
  ldconfig

2) then do this (your actual directories and ".so" suffixes may vary)
  sudo ln -s /usr/local/cuda/lib64/libOpenCL.so /usr/lib64/libOpenCL.so.1.0
  sudo ln -s /usr/local/cuda/lib/libOpenCL.so /usr/lib/libOpenCL.so.1.0

and also:
  sudo ln -s /usr/lib64/libOpenCL.so.1.1 /usr/lib64/libOpenCL.so.1
  sudo ln -s /usr/lib64/libOpenCL.so.1 /usr/lib64/libOpenCL.so
  sudo ln -s /usr/lib64/libOpenCL.so.1.1 /usr/lib64/libOpenCL.so.1.0

3) AND MOST IMPORTANTLY:
check "/etc/OpenCL/vendors/nvidia.icd" to make sure they reference the OpenCL library!
My Ubuntu setup only had a reference to libopencl.so, even though my computer didn't have such a file installed.  All my shared OpenCL libraries were named "libOpenCL.so", so I added this to the nvidia.icd file:
"libOpenCL.so"
"libcuda.so"

Now I get error -1001 (No valid ICDs found) instead of -5 (CL_OUT_OF_RESOURCES).  So I'm not done yet, but I'm making progress!  I'm thinking I need to install some ICD software that matches my driver, hope that's it.

Good luck!  Hope this helps someone.