Screen brightness does not work in Ubuntu Mate 16.04


#1

When I use my function key to adjust brightness the computer freezes. I tried to use xbacklight but that has no effect.

[email protected]:~$ xbacklight -get
100.000000
[email protected]:~$ xbacklight -set 110
[email protected]:~$ xbacklight -get
100.000000
[email protected]:~$ xbacklight -set 90
[email protected]:~$ xbacklight -set 50
[email protected]:~$ xbacklight -get
50.000000
[email protected]:~$ xbacklight -set 100
[email protected]:~$ xbacklight -set 10
[email protected]:~$ xbacklight -get
10.000000
[email protected]:~$ xbacklight -set 11
[email protected]:~$ xbacklight -set 1
[email protected]:~$ xbacklight -get
0.000000
[email protected]:~$ xbacklight -set 100
[email protected]:~$

had no noticeable effect on my screen brightness.