nvidia-smi报错（重装Nvidia驱动）

遇到一个莫名其妙的问题：

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

解决方案：重装NVIDIA驱动（非cuda）

首先在官网下载你自己显卡对应的驱动NVIDIA-Linux-x86_64-xxx.xx.run，拷贝到Linux某个目录后先改权限

chomod 777 NVIDIA-Linux-x86_64-xxx.xx.run

卸载原驱动

sudo apt-get remove --purge nvidia*  # 提示有残留可以接 sudo apt autoremove

临时关闭显示服务

sudo service lightdm stop

运行安装程序

sudo ./NVIDIA-Linux-x86_64-390.77.run

安装后再重启显示

sudo service lightdm start