NVIDIA-SMI has failed because it couldn’t communicate with the NVIDIA driver.

在运行 nvidia-smi时出现以下错误：

NVIDIA-SMI has failed because it couldn’t communicate with the NVIDIA driver.

解决方法：

step1: 运行 “nvcc -V”

(base) wzg@wzg:~/Desktop$ nvcc -V
nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2019 NVIDIA Corporation
Built on Wed_Oct_23_19:24:38_PDT_2019

step2: 运行“whereis nvidia”

(base) wzg@wzg:~/Desktop$ whereis nvidia
nvidia: /usr/lib/nvidia /usr/share/nvidia /usr/src/nvidia-440.33.01/nvidia

根据返回的信息，我的nvidia的版本是440.33.01

step3: 运行 “sudo apt-get install dkms”

sudo apt-get install dkms

step4: 根据step3得到的nvidia版本信息，执行以下命令

sudo dkms install -m nvidia -v 440.33.01

参考：https://www.jianshu.com/p/3cedce05a481

https://blog.youkuaiyun.com/u012114438/article/details/104425573