I have Asus G55 ES71 laptop and I recently installed Ubuntu in it. Whenever I start my laptop, the brightness level is set to maximum by default and it doesn't change. Manually changing it through settings doesn't help. I have also tried the solutions posted on forum like this one :
gksudo gedit /etc/rc.local
echo X > /sys/class/backlight/intel_backlight/brightness
I tried substituting X with different values and rebooted but nothing happened. I manually tried to change the values in files
brightness from directory
/sys/class/backlight/acpi_video0 but those files are read only and don't allow me to change the values. I have actual_brightness=0, brightness=0 and max_brightness=10 in those files currently.
As a computer engineer, I am required to sit in front of it the whole time and it's really taking a toll on my eyes!