We enable two displays HDMI-0 and DSI-0 on TX2.
Use xrandr can found HDMI-0 as primary screen and DSI-0 as secondary screen.
After bootup completely, HDMI-0 auto show left screen and DSI-0 auto show right screen.
We can use below xrandr command to force DSI-0 same as HDMI-0.
xrandr --output DSI-0 --same-as HDMI-0
My concern is how to force HDMI-0 and DSI-0 to show the same screen after bootup without typing xrandr command by hand again?