Case-1 Recently I read a question(Brightness is reset to Maximum on every Restart). Then I opened up my terminal and typed out following command-
sudo echo 200 > /sys/class/backlight/intel_backlight/brightness bash: /sys/class/backlight/intel_backlight/brightness: Permission denied
Since I am using this in root, this command should replace my value. Why value is not being replaced by new one?
Case-2 On folder /sys/class/backlight there is another folder acpi_video0, there is file named brightness, should I need to do something in here?