@JeroenH Actually, it’s super simple. All it does is going to /sys/devices/mdp.0/qcom,mdss_fb_primary.171/leds/lcd-backlight and then setting the value inside the brightness-file to 1. 10 is the minimum you can get with the brightness slider. I can even edit the file manually, and as soon as I hit save the screen brightness changes (from 0-255, 0 turns off the backlight completely btw). So, in theory, all it needs is an app that constantly checks the brightness file and changes the value back to the value the user chose in case Android overwrites it.
Keep in mind that the path to the file probably varies. I have an FP2 with LOS15.1.
2 Likes