解决办法：nvidia-settings:ERROR: Unable to load info from any available system

　　遇到这个错误，也让人很无奈，还好，吾终于找到了解决办法：

sudo apt-get install nvidia-settings

　　之后又出现下面的错误，不知何意： 

** (nvidia-settings:3684): WARNING **: PRIME: 执行子进程“/usr/bin/prime-supported”失败(没有那个文件或目录)
** Message: PRIME: is it supported? no

ERROR: nvidia-settings could not find the registry key file.
       This file should have been installed along with this
       driver at
       /usr/share/nvidia/nvidia-application-profiles-key-docu
       mentation. The application profiles will continue to
       work, but values cannot be prepopulated or validated,
       and will not be listed in the help text. Please see
       the README for possible values and descriptions.