I have a laptop, Gateway MX6440. Usually when I plugged my laptop the monitor is lighter than when my laptop is unplugged (using battery), but now this is not happening.
When I unplugged (using battery) my laptop the monitor is brighter!!!!! And, of course, when I plugged it is darker.
I tried to look for any settings that may help me to change this, but could not find it.
I would really appreciate any help