【NVIDIA】显卡报错：NVIDIA-SMI has failed because it couldn‘t communicate with the NVIDIA driver

输入nvidia-smi报错如下：

NVIDIA-SMI has failed because it couldn't communicate with the NVIDIA driver. Make sure that the latest NVIDIA driver is installed and running.

原因主要为：这是一个常见问题，经常出现在ubuntu系统中，主要原因还是系统内核升级了，导致新版本内核和原来显卡驱动不匹配

解决如下：
1、查看nvidia版本号

ll /usr/src/

示意图如下：

2、安装dkms

sudo apt-get install dkms

3、执行

sudo dkms install -m nvidia -v 460.84