SOLVED: guess the "GUI" environment triggered the request to sleep after 30min - given that I run the Joule headless: disabling "Gnome" and "lightdm" did the trick - system up and running for hours (didn't reverse the masking of sleep, suspend, hibernate, hybrid...) Thank to all of you for the hints - Best Michael --- [Visit Topic](https://discourse.ros.org/t/turtlebot3-joule-stalled/2739/10) or reply to this email to respond. If you do not want to receive messages from ros-users please use the unsubscribe link below. If you use the one above, you will stop all of ros-users from receiving updates. ______________________________________________________________________________ ros-users mailing list ros-users@lists.ros.org http://lists.ros.org/mailman/listinfo/ros-users Unsubscribe: