Need configuration parameter for /sys/class/backlight
I have two backlight interfaces: intel_backlight and nvidia0. Both of them have 'raw' types. Powerdevil uses upower backlight helper that just reverse sorts all available interfaces and picks the first one. There's no possibility to point it to use the right interface. So in my case, it just picks nvidia0 interface while intel_backlight actually used to change brightness.
Expected behavior: use configured backlight interface if any.
Actual behavior: use the last one from the list of interfaces with the same priority.