Hi, I wonder if you could add some CLI to adjust brightness. My function keys aren't recognize at all but brightness management with the panel plugin works perfectly. I would like to create my own keyboard shortcut and xfpm-power-backlight-helper --set-brightness X does not seem to do what I want. (Well I don't even know where to begin a power management script. Dbus is a bit difficult to get the hang of it.)
I guess the main problem will be that you need root rights to run xfpm-power-backlight-helper. We have merged the brightness plugin into a more general power-manager panel plugin. While this isn't a CLI for adjusting the brightness, it offers a very convenient way to change it for those whose shortcuts don't work for one reason or another.
If you're creating a script you'll probably want to call the xfpm-power-backlight-helper with pkexec for --set-brightness i.e. pkexec /usr/sbin/xfpm-power-backlight-helper --set-brightness 937 This was you can use the polkit authorization rules to run it as root, the same as xfpm does.
Marking as resolved. If you have more questions, let us know!