Screen Goes Black After Clicking "Add Screen"

[ghost]

After installation, clicking the "ADD DISPLAY" button caused the screen to go black immediately, but the device did not shut down. My device is an ROG Ally X with an AMD Z1 Extreme CPU.

[nomi-san]

Sorry for late reply.
I think you have connected an external display before and set it as main display (also turn of your internal display). You can try deleting this registry key in your ROG handheld and restart it.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\GraphicsDrivers\Connectivity