On Sat, 06 Jan 2018 18:46:25 +0200, Melleus wrote:

> > What do the logs say?  
> That's all I could find in syslog:
> 
> connmand[6709]: Aborting (signal 11) [/usr/sbin/connmand]
> 
> > Can you start it manually?  
> 
> No, it pretends to start but fails silently.

Looking at the man page, try adding --debug=DEBUG and --nodaemon


-- 
Neil Bothwick

Physics is like sex: sure, it may give some practical results, but
  that's not why we do it.                            Richard Feynman