The problem I had was related to a conflict with nvidia driver. I managed to solve it purging the following packages
nvidia-libopencl1:amd64
(340.76-5),
nvidia-alternative:amd64 (340.76-5), nvidia-installer-cleanup:amd64 (20141201+1), nvidia-opencl-common:amd64 (340.76-5), libcuda1:amd64 (340.76-5), glx-alternative-mesa:amd64 (0.5.1), nvidia-modprobe:amd64 (349.16-1), nvidia-opencl-icd:amd64 (340.76-5), glx-diversions:amd64 (0.5.1), libnvidia-compiler:amd64 (340.76-5), glx-alternative-fglrx:amd64 (0.5.1), libfglrx-amdxvba1:amd64 (15.7-1), nvidia-kernel-3.16-3-amd64:amd64 (), libnvidia-ml1:amd64 (340.76-5), glx-alternative-nvidia:i386 (0.5.1), nvidia-kernel-common:amd64 (), libgl1-fglrx-glx:amd64 (15.7-1), nvidia-smi:amd64 (340.76-5) |