My problem is that the ipad can duplicate the screen, but there is no second screen displayed in the system display settings
If it shows that there is a second screen, it can be solved by directly adjusting win+p to expand
If the problem is the same as mine, you can solve it according to the following steps
1. Connect the ipad to the desktop.
2. On the PC side, xDisplay, on the advanced page, check Enable mirroring mode first (at this time, if you open the display settings, you still can’t detect other screens, it doesn’t matter, just put it there) and then uncheck it ( At this time, the display settings will be automatically refreshed, and you can see other screens at this time)
(Note that both are turned on at the same time. If you check it first, then uncheck it, and then turn on the system display settings, it may be useless)
3. At this time, set it to the extended mode and it will be OK
If you can't solve it, reinstall it and repeat the above steps
Turn Your Tablet Into a Monitor | Splashtop Wired XDisplay | Use Your Tablet as a Second Screen