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linux内核升级后的nvidia驱动问题；
首先安装dkms工具：
centos:
1.yum install -y epel-release;
2.yum install -y kernel-headers kernel-devel dkms
ubuntu:
1.apt-get install dkms
使用dkms工具更新驱动：
1.查看现有驱动版本：ls /usr/src |grep nvidia
2.在新内核上安装现有驱动：dkms install -m nvidia -v 410.129
