nvidia独显电脑，开机登陆界面在副屏的解决办法

1.网上解决方案

https://askubuntu.com/questions/1043337/is-there-to-make-the-login-screen-appear-on-the-external-display-in-18-04
问题：在nvidia独显电脑上不生效

2.实际解决方法

1.配置好主副屏
2.打开nvidia-settings
3.在X Server Display Configuration中选择Save X Configuration File
4.重启，OK