ERROR: clCreateContext(): CL_UNKNOWN_ERROR

[kiara]

Please try with any other OpenCL program (not CUDA)

But it did work before they updated the Nvidia Cuda and opencl driver. 
For my use it's pointless to use another opencl since CUDA is what I want to use. 
And no other opencl have ever worked with my bumblebee setup

prehaps after updating and upgrading ur system with apt, ur hashcat version was upgraded aswell (happen to me to) from 2 to 3, since v3 dont use cuda anymore it wont work with out opencl, i guess if u want to use hashcat with cuda u will have to go back to V2

https://hashcat.net/files_legacy/cudaHashcat-2.01.7z