合上笔记本电脑盖后，我的屏幕没有被锁定。笔记本电脑挂起但屏幕未锁定。
我检查了多个设置：
gnome-control-center > brightness & lock > lock on and require password when waking from suspend enabled
dconf-editor > org/gnome/desktop/lockdown/disable-lock-screen disabled
dconf-editor > org/gnome/desktop/screensaver/lock-enabled enabled
dconf-editor > org/gnome/desktop/screensaver/ubuntu-lock-on-suspend enabled
但是暂停后无法锁定我的屏幕。我还能尝试什么？