Comment 5 for bug 916595

[SOLVED workaround]

using function keys to decrease the brightness works temporarily but once you open the birghtness & lock settings or the screen dims then moving the pointer increases to fullest.

It looks like the fuction key settings is not linked to the birghtness & lock settings when I decrease/increase the brightness the slider does not move and stays constant.

The best way is to decrease brightness from the slider in the "brightness & lock" settings

see screenshot