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Nubia M2 LCD backlight adjusting

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By Lord of Destinies, Junior Member on 14th August 2019, 12:12 PM
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Hey guys!
Need to adjust the minimal backlight brightness in system.
After changing the LCD for the bad copy, the backlight has power off after turning the brightness slider to the minimum position.
I tried to add to build.prop lines
Code:
ro.lcd_min_brightness=[value]
ro.lcd_brightness=255
But nothing changed.
There are files "brightness" and "max_brightness" in the directory /sys/class/leds/lcd-backlight/ Here I can change the values of current brightness and max brightness but not the minimum. I tried to manually put the "min_brightness" file with necessary value to the specified directory by the "echo" or copy commands. But system didn't allowed this with "permission denied" message even having root or from TWRP with system mounted as r\w.
The minimum (necessary) value at wich the backlight don't powers off is 47 of 255.
Any idea how can I set the minimum value?

Phone:
Nuba M2 NX551J, Android 6.0.1, Nubia UI v4.0, build NX551J_ENCommon_V1.13
 
 
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