unity - i3wm, adjust brightness through command line - Ask Ubuntu


i've got precision 5510 running ubuntu 16.10 kernel 4.8.4. in unity, function keys brightness work correctly. xbacklight commands don't anything. xbacklight -get comes empty. there way increase / decrease brightness through command line? need work in i3wm.

you may modify value in /sys/class/backlight/{may vary}_backlight/brightness

example:

sudo nano /sys/class/backlight/intel_backlight/brightness

this tool https://github.com/multiplexd/brightlight use this:

bindsym xf86monbrightnessup exec --no-startup-id brightlight -i 20 bindsym xf86monbrightnessdown exec --no-startup-id brightlight -d 20

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