Acer Gateway Brightness problem solved

I encountered a problem with Gateway laptop. The brightness level can't be changed neither from keyboard shortcut nor from gnome-power-manager.

If you encounter the same problem, open terminal and type

xrandr --output LVDS --set BACKLIGHT_CONTROL native
or
xrandr --output LVDS --set BACKLIGHT_CONTROL legacy
To make this fix permanent add the above line in your startup(From Menu, System, Preferences, Startup Applications).

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