Hello, I ran into the same issue. Can I provide any further information? The same problem seems to be present in Ubuntu: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1605189
I tried the workaround mentioned there in the last comment (configure screensaver not to lock the screen) and it works. Not nice from a security point of view, but might be better than letting the system waste energy for some days. Regards, Benedikt Wildenhain -- Benedikt Wildenhain, M.Sc., Wiss. Mitarbeiter - Hardwarenahe IT-Systeme Hochschule Bochum - Bochum University of Applied Sciences Campus Velbert/Heiligenhaus - http://www.hs-bochum.de/cvh/ Kettwiger Str. 20, Heiligenhaus, Raum 2-37, Tel +49 2056 5848-16744