Am 15.01.2017 um 20:23 schrieb Kevin Fenzi:
Likely you are logged into a wayland session? In that case
won't work. You could choose a Gnome on X11 session.
I use Awesome WM which uses X.
Gnome should let you adjust the brightness however... does that
I'll have to see whether I can use the GNOME session. Last time I tried,
neither variant let me log in.