Folding Forum

Just in case it helps anyone else, I ran into the "OpenCL: Not detected: clGetDeviceIDs() returned" issue on one of my old laptops running Ubuntu 18.04 with a Quadro K1100M card in it.

Turns out I had a version of OpenCL installed for running OpenCL kernels on the CPU (the beignet-opencl-icd package in Ubuntu) and this was confusing FAHClient. Once I uninstalled the beignet-opencl-icd package, everything worked fine.

In case somebody has this "OpenCL: Not detected: clGetDeviceIDs() returned -1" error on Gentoo. My FAHClient was running fine. Then after I compiled some packages with OpenCL support (opencl use flag), this error occured. It helped me to compile media-libs/mesa again, this time without opencl use flag. Now my GPU is running again.