也不知道是什么原因，输入nvidia-smi会有这个bug。看到一个帖子中遇到和我类似的问题：
I have several issues actually, but I am not sure whether they are related.
nvidia-smi out puts no device were found.
The system cannot detect the second display.
The fractional scaling is not working (can only set to 200% even if I set 150%).
The update rate is incorrect in system setting.有一个评论解决了我的问题：
Wrong driver, please either switch to the non “-open” driver version in Software&Updates or set the appropriate module option.我安装的显卡驱动是nvidia-driver-525-open，带有open，换一个不带open的驱动就好了，鬼bug。文章来源：https://www.toymoban.com/news/detail-516250.html
参考：https://forums.developer.nvidia.com/t/nvidia-smi-outputs-no-devices-were-found-on-ubuntu-22-04-driver-520/234829文章来源地址https://www.toymoban.com/news/detail-516250.html
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