I am running ubuntu 14.04 64 bit and nvidia drivers 331.38 and had the same problem of OpenCL not being available in Darktable.
This got fixed for me by a solution proposed to fix another OpenCL issue here: http://askubuntu.com/questions/449507/nvidia-libopencl1-331-has-to-be-removed-before-installing-wine?rq=1
What I did was:
sudo apt-get install nvidia-cuda-toolkit
and then
sudo apt-get install ocl-icd-opencl-dev
After a reboot, Darktable's "activate OpenCL support" is not greyed out anymore and seems to work like it should.
I am running ubuntu 14.04 64 bit and nvidia drivers 331.38 and had the same problem of OpenCL not being available in Darktable.
This got fixed for me by a solution proposed to fix another OpenCL issue here: askubuntu. com/questions/ 449507/ nvidia- libopencl1- 331-has- to-be-removed- before- installing- wine?rq= 1
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What I did was:
sudo apt-get install nvidia-cuda-toolkit
and then
sudo apt-get install ocl-icd-opencl-dev
After a reboot, Darktable's "activate OpenCL support" is not greyed out anymore and seems to work like it should.