I have Acer Aspire 5742g and my brighteness fn keys not working....
Also when I click fn + left arrow than I can "change" screen size or if I click more time than my Cinnamon crashed!
Maybe someone knows how I can change to keys are working how it must work and what exactly I do with Fn + left arrow???
Brightness fn keys not working on an Acer Aspire 5742g