【解决问题：Failed to initialize NVML: Driver/library version mismatch】
首先需要查看驱动内核版本，终端输入：
cat /proc/driver/nvidia/version
比如我这里显示的是440.100，记住这个数字；然后卸载驱动，终端输入：
sudo apt-get purge nvidia*
终端输入：
sudo add-apt-repository ppa:graphics-drivers
sudo apt-get update
最后重新安装驱动，需要将“440”替换成刚才查到的版本号：
sudo apt-get install nvidia-driver-440 nvidia-settings nvidia-prime
hlx2@NLP:~/桌面/pycharm-community-2018.2.3/bin$ sudo apt-get install nvidia-driver-440 nvidia-settings nvidia-prime
正在读取软件包列表... 完成
正在分析软件包的依赖关系树
正在读取状态信息... 完成
E: 无法定位软件包 nvidia-driver-440
下载安装:
sudo systemctl stop lightdm
sudo sh NVIDIA-Linux-x86_64-440.82.run
There appears to already be a driver installed on your system (version:
440.82). As part of installing this driver (version: 440.82), the existing
driver will be uninstalled. Are you sure you want to continue?
选择 Continue installation
The distribution-provided pre-install script failed! Are you sure you want
to continue?
选择 Continue installation
WARNING: Unable to find a suitable destination to install 32-bit
compatibility libraries. Your system may not be set up for 32-bit
compatibility. 32-bit compatibility files will not be installed; if
you wish to install them, re-run the installation and set a valid
directory with the --compat32-libdir option.
选择 ok
Would you like to register the kernel module souces with DKMS? This will allow DKMS to automatically build a new module, if you install a different kernel later?
选择 No 继续。
问题大概是：Nvidia’s 32-bit compatibility libraries?
选择 No 继续。
Would you like to run the nvidia-xconfigutility to automatically update your x configuration so that the NVIDIA x driver will be used when you restart x? Any pre-existing x confile will be backed up.
选择 Yes 继续
https://www.nvidia.cn/geforce/drivers/
搜索结果往下拉....
禁用更新：
sudo apt-mark hold nvidia-driver-440
到这里就OK了，终端输入nvidia-smi看一下是否出现了显卡信息，有的话大功告成！
参考链接：Ubuntu中Failed to initialize NVML: Driver/library version mismatch问题的解决