Turnoff backlight from LCD screen with qt application running in Background

Hello all,

I would like to turn off my backlight in LCD rouchscreen display, while the qt application should run in background.

I tried with /etc/power/state with standby and freeze. but it restarts my application.

is there any possiblity to turn off backlight.

Thank you


thank you for the suggestion. I found the answer to implement the backlight power on/off.

how did you implement your solution?

How is your display connected to your Apalis device? Backlight control is usually implemented with an on/off switch which you can control via a GPIO, and/or through dimming with PWM.

Ok, thanks for the information.

i found the backlight BLK_ON gpio pin from the datasheet and implemented it in the device-tree.