Working now! I noted that every time I start a scenario, I can't do anything and the log tells me that there is no controller. But when I end the scenario and start the same or another scenario, it works. When I close and restart OpenClonk after that, I have to do this again - the first try does never work here. I think it's been like that since you told me that OC can compile without SDL lol. I always closed OC when I noted that it does not work on the first try because I thought the success chance would be higher when restarting Clonk after changing something like switching usb slot e.g.