Screen blinking after installation

[Lays]

After installation, the screen will blink when you turn on the car, it will only stop after turning on the headlight, ie when  turn the display button to on do,  stay will be prompted to calibrate the ringtone.
I installed on a Saveiro VW and the same problem happened.

If anyone can help me, I'll be grateful.

[Lays]

The problem is related to backlight control.

Inactivating the function The on-screen display flashes in the same way as the start-up, even when the headlight is on.