Comment # 24 on bug 1156501 from Dr. Werner Fink

(In reply to Fabian Vogt from comment #23)
> (In reply to Dr. Werner Fink from comment #20)
> > I should mention that dbus-launch requires X11 $DISPLAY ... and I really
> > like to know *Why* a dbus launch depend on X11 screen?
> 
> It is meant only for X11. The man page explicitly states:
> 
> > To start a D-Bus session within a text-mode session, do not use dbus-launch. Instead, see dbus-run-session(1).

I'm aware ... nevertheless, at login regardless if X11 or tty a user local
known should be able to do his/her work without calling dbus-run-session(1).
And even with dbus-run-session(1) is does currently not work.

IMHO this is simply broken by design.  Is there a way to cause pam_system(.so)
to use path=/run/user/<pid>/bus for dbus connections regardless what interface
is used, that for X11 *and* tty.  And, if not running on
path=/run/user/<pid>/bus, simply start the dbus for any user session regardless
what type is used.