11-15-2018, 10:11 AM
Commands above makes effect within the Trinity desktop. Anyway, you should be able to change brightness using terminal command:
$ xbacklight -set<xx>
replace "xx" with the brightness percentage value, for example:
$ xbacklight -set99
$ xbacklight -set<xx>
replace "xx" with the brightness percentage value, for example:
$ xbacklight -set99