I was having issues running Hashcat after doing Dist Upgrades and was getting the following error:

Code:
OpenCL Platform #1: Mesa, skipped! No OpenCL compatible devices found
First I tried uninstalling and reinstalling Mesa but this didn't work.I was able to fix this by installing the following package. Note: I have an Intel CPU.

Code:
apt-get install beignet-opencl-icd
This package contains the shared library for the Intel implementation, which supports the integrated GPUs of Ivy Bridge (ix-3xxx)/Bay Trail and
later Intel processors. The version I installed is 1.2.1-1.

Hope this helps.

G3Cube