I have a HSA1600 and the researcher reported that the GPU could not be mobilized, I checked nvidia-smi and found the error message reported.
$ nvidia-smi
Unable to determine the device handle for GPU 0000:1E:00.0: Unknown Error
~$ nvidia-debugdump --list
Found 16 NVIDIA devices
Error: nvmlDeviceGetHandleByIndex(): Unknown Error
FAILED to get details on GPU (0x0): Unknown Error