有N卡但是nvidia-smi命令不显示信息出现NVIDIA-SMI has failed because it couldn't communicate with the NVIDIA driver

问题描述：使用nvidia-smi命令出现NVIDIA-SMI has failed because it couldn’t communicate with the NVIDIA driver. Make sure that the latest NVIDIA driver is installed and running

cd /usr/src/

ls

然后查看nvidia-xxx，xxx为版本号，记下

sudo apt-get install dkms

sudo dkms install -m nvidia -v xxx（你的nVidia版本号）

然后就可以用nvidia-smi命令查看信息啦