1.在终端输入命令nvidia-smi，报错
NVIDIA-SMI has failed because it couldn‘t communicate with the NVIDIA driver.
2.查看已经安装驱动的版本信息
ls /usr/src | grep nvidia
会出现版本号，例如450.82
3.输入以下命令
sudo apt-get install dkms sudo dkms install -m nvidia -v 450.82
根据自己的版本号输入，之后再输入nvidia-smi，就会出现GPU的使用状态了
nvidia-smi has failed because it couldn't communicate with the nvidia driver
原文：https://www.cnblogs.com/glam/p/14814922.html