Hello, I’ve got an issue similar to yours. nvidia-smi does not show me the error you mention, however, miner log shows me that ethminer does not work and
“CUDA: Unknown error
Error: No usable mining devices found”.
I have Nvidia driver 460.39 + Cuda 11.2.
2 GTX 1070
Does anyone have a clue about what’s going on? Your help will be deeply appreciated!