Hi Torben, My tests are inconclusive, but I'm getting results similar to what Martin Profittlich gets. However, I noted that sometimes the absence of a GUI seemed to be related to lashd. Here's the process: Load a plugin with fst. Play a while. Close the plugin instance. Load another plugin with fst. Here the GUI may or may not draw itself. If not, I close the plugin and run 'killall lashd'. Load the same plugin again. Some misbehaving plugins will then draw their GUIs properly. I also noted occasional zombification with JACK 0.115.6. I had problems with 0.116 so I downgraded. I'll keep testing and will send a more detailed report. Best, dp _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user