Working on setting up my first arcade-machine at the moment, and bought the howler from the kickstarter.
Setting it up with RetroPie i soon noticed the problem with support for the howler.
Found your RGB commander, and was hoping i could use it, but noticed the missing howler-support.
Not sure if you'll see this, but according to
https://github.com/Mokosha/libhowler i believe the vendor id is 03eb (Atmel Corp.)
Not so used to Linux, but I get the same result when i run the commands, and that driver works.
If you need me to do anything to test i'd be happy to help you
