I have a fresh install of Ubuntu 16.04.3 with Pro Driver version 17.Q4. Driver installs fine and the graphics (including OpenGL) works fine, but OpenCL doesn't work. 'clinfo' reports not to find any devices.
I tried replacing the WX 3100 with an RX 560 and the RX works without any problems (including OpenCL).
Tested on two different machines (one Opteron and one Ryzen) with identical results. I'm sure this is a driver bug, but I don't know where to report it.
Does anyone else have experience with the 17.Q4 driver on Ubuntu 16.04.3?