The ubuntu20.04 main screen is synchronized with the extended screen

The group will use the ubuntu system to connect to the projector, and there will be out-of-sync phenomena.
Synchronize with the following command:

1. After the connection line is connected, use the xrandr command to check the status of the connection port

xrandr

Here is the effect of eDP-1 and HDMI-1
:

2. Set the extension screen to synchronize with the main screen

xrandr --output HDMI-1 --same-as eDP-1 --auto