I use v2 and the file permission is rw rw rw.
I open the file "btightness" with any text editor and i see that the default value is 25. than i set the value to 7 and save the file. The brigness level remains to 7 until the touch key lights turns off for the first time. When i touch the screen again the lights are brighter and if i open the file, the value is reset to 25.
But if I go to Settings => Display => Brightness => Front key light, and turn it off, the brightness value remains at 7 but the lights remain lit all the time, even in deep sleep.
It has to do with the kernel that automatically overwrites the value, and when i disable them from settings, the kernel already consider them off even if the LED Notification use them?
Oh I started to understand what you meant. You shouldn't use the "LG Touch LED Notifications" 's brightness in Miscellaneous -> Touch LED options -> Touch LED brightness (set it to 0). Then you can disable the Front key light. This way, constant mode's feedback will work in test too.