01-23-2017, 06:01 AM
Radeon HD 4000 series GPUs do not really have OpenCL support. It has been many years now so I do not remember what the precise issue was, and too lazy to Google it, but I believe the hardware only supports a half-baked OpenCL 1.0 implementation. ATi didn't get real OpenCL support until HD 5000 series.
Also I believe there are many known issues with Mesa as well. But that's the least of your issues really.
Also I believe there are many known issues with Mesa as well. But that's the least of your issues really.