Exactly how is this bug distinct from #750533? (Why shouldn't they be merged?)
I'm seeing similar[*] warnings from colord, which I traced down to the fact that cupsd does not belong to a systemd session. From its /proc/self/cgroup: 1:name=systemd:/system.slice/cups.service I don't see anything wrong with that state of affairs (cupsd is a system-wide service, not associated with any particular seat), so I don't think this needs to be logged at severity WARNING (unless it's somehow a mistake for a process not associated with a seat to send messages to colord, but I don't see why that should be the case). Can we get that g_warning() changed to g_debug()? (On a not entirely unrelated note, I don't think this bug deserves to be at severity important.) [*] I'm seeing ENOENT (as in #750533) rather than ENODEV, but this is with jessie's systemd and kernel.
