nvidia-settings报错：
ERROR: Unable to load info from any available system，
nvidia-smi 报错：
NVIDIA-SMI couldn't find libnvidia-ml.so library in your system. Please make sure that the NVIDIA Display Driver is properly installed and present in your system.
Please also try adding directory that contains libnvidia-ml.so to your system PATH.
切换显卡解决方案:
仅切换显卡可使用sudo prime-select nvidia，可以切换到n卡，但是nvidia-settings，nvidia-smi依然报错
完整解决方案:
删除X11配置文件
sudo rm /etc/X11/xorg.conf*
重新生成配置文件
sudo nvidia-xconfig
切换到n卡
sudo prime-select nvidia
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