(In reply to Andreas Vetter from comment #1) > Two ways come to my mind to solve this: > 1) Set KillMode=control-group for rebootmgr.service This is the default... The question is, which of the libraries is doing the fork and why it is blocking the kill signals. Are there any more useful error messages around rebootmgr? I have never seen this on my MicroOS and Tumbleweed machines...