It's difficult to reproduce but in some cases, Libervia will believe that you are disconnected when you are not, then you can't disconnect... I think this can be fixed here in server.py: def disconnected(self, profile): if not profile in self.sat_host.prof_connected: log.error("'disconnected' signal received for a not connected profile") return self.sat_host.prof_connected.remove(profile) if profile in self.signalDeferred: self.signalDeferred[profile].callback(("disconnected",)) del self.signalDeferred[profile] else: if profile not in self.queue: self.queue[profile] = [] self.queue[profile].append(("disconnected",)) Remove the return statement and do this instead: if not profile in self.sat_host.prof_connected: log.error("'disconnected' signal received for a not connected profile") else: self.sat_host.prof_connected.remove(profile) So you always try to fire the disconnected signal (and I believe that this is harmless).