[Pkg-utopia-maintainers] Bug#833318: /etc/X11/Xsession.d/95dbus_update-activation-env: dbus-update-activation-environment --systemd always fails without dbus-user-session package installed

[Simon McVittie]

On Tue, 27 Nov 2018 at 09:41:00 +0100, Thomas Martitz wrote:
> Without this packages, the KDE session and all user units had their own dbus
> server/bus. Only after installing the dbus-user-session package all share
> the same bus under /run/user/1000/bus.

What do you consider to be a bug here? Please phrase it in terms of:

* what I did
* what I expected should happen
* what actually happened

> However, from examining /etc/X11/Xsession.d/*, in particular the call to
> dbus-update-activation-environment --systemd, that suggests that this should
> be the default configration.

What, specifically, do you think should be the default configuration?

The purpose of the dbus-user-session package is that it gives sysadmins
the choice between two models for what "the session bus" means:

* without dbus-user-session: each X11 session has its own separate
  session bus, and there is no per-uid session bus that can be used to
  communicate with `systemd --user` (this is the traditional behaviour)

* with dbus-user-session: there is one session bus per uid, spanning
  one or more possibly overlapping login sessions (this is now the
  recommended behaviour)

Thanks,
    smcv