As a follow-up, I summarized all the KMix bugs I've run into + my setup and some debugging attempts here: https://gist.github.com/jstolarek/9541d35cded45e593b41ed48aaadc521 That should probably end up somewhere on the bugtracker but I went for easy to read markdown formatting. I wonder whether it would be possible to back-port KMix fixes from testing builds to PSB? Janek