当我nvcc --version在终端上运行时，我得到：
nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2015 NVIDIA Corporation
Built on Tue_Aug_11_14:27:32_CDT_2015
Cuda compilation tools, release 7.5, V7.5.17
但是当我写 nvidia-smi 时，它给出了以下错误：
Failed to initialize NVML: Unknown Error