I've a HDMI display attached to a RasperryPi 4. After few minutes, first a blank screen is activated, then the display goes into standby.
I want to wakeup the display from standby (by a sensor via bash script) but don't interrupt the blank screen.
I know wakeup is possible with:
DISPLAY=:0.0 xset dpms force on
but is also interrupts the blank screen.