显卡驱动突然崩了
NVIDIA-SMI has failed because it couldn‘t communicate with the NVIDIA driver. Make sure that the latest NVIDIA driver is installed and running.
重新安装驱动
sudo apt-get remove nvidia-* sudo apt-get autoremove
sudo apt-get autoremove
sudo nvidia-uninstall
sudo ./NVIDIA-Linux-x86_64-381.22.run -no-x-check -no-nouveau-check -no-opengl-files
原文：https://www.cnblogs.com/573177885qq/p/9608971.html