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.
