I get your point. At some point this widget provided an option to specify the backend command manually, though I removed it because I couldn't see any use cases. I would happily add this functionality again if you require it.
Using this driver, Powerdevil does not allow you to set values individually per monitor, instead gives you only a single slider. This is absolutely sufficient for single monitor or multi monitor setups with identical models, but in my case I need the option to set it individually since my monitors are all differently bright on 100%.
Using this module, Powerdevil does not allow you to set values individually per monitor, instead gives you only a single slider. This is absolutely sufficient for single monitor or multi monitor setups with identical models, but in my case I need the option to set the brightness individually since my monitors are all differently bright on 100%.