Hi,
when I use colour balance for B&W the screen turns black.
It does not happen if I use filters (which I have created as a user) in the colour calibration module. Also not if I use LUA for black and white film filter.
i filed an issue for that. I just was able to reproducte this with the intel on-cpu-gpu.
You can check, which device is in use running darktable -d opencl | grep -e'dev_process_' -e'using device' -e'opencl_init'
it seems you’re using osx. can you confirm it’s the intel device that fails?
0.207041 [opencl_init] kernel loading time: 0.0208
0.207047 [opencl_init] OpenCL successfully initialized.
0.207048 [opencl_init] here are the internal numbers and names of OpenCL devices available to darktable:
0.207049 [opencl_init] 0 ‘GeForce RTX 3070 Laptop GPU’
0.207050 [opencl_init] FINALLY: opencl is AVAILABLE on this system.
0.207052 [opencl_init] initial status of opencl enabled flag is ON.