[systemd-devel] Xorg or Wayland Environment

[Michael Biebl]

Just curious:

Can someone familiar with KDE/Plasma tell us, if they nowadays (can)
use "systemd --user" to manage a login session.


Am Di., 21. Sept. 2021 um 12:52 Uhr schrieb Ed Greshko <ed.greshko at greshko.com>:
>
> On 21/09/2021 18:20, Colin Guthrie wrote:
> > Ed Greshko wrote on 19/09/2021 12:11:
> >> OK......
> >>
> >> I think I see the problem now.  I don't need Environment=.  But the issue is that, I assumed, "plasma-core.target" would be
> >> reached only after a user logged in to plasma.
> >>
> >> I was wrong and the user's service is run earlier when the login screen appears.
> >
> > I'm slightly confused by the logic here. Why is a user's systemd even running before they've logged in? If the user has lingering enabled, then it might have a systemd instance from that, but it certainly shouldn't reach any plasma-core.target as the login GUI should be running as a different user to your user I would have thought?
> >
> > e.g. under gnome, the login GUI runs as the "gdm" user. That user has a systemd --user instance, and runs various things but only once a real user has logged in will it's own systemd instance start and reach the appropriate targets.
> >
> >> I need to find a way such that the service only runs when a user logs on to the plasma GUI.
> >
> > It seems a bit odd to me that your users' plasma-core.target has been run when your user hasn't even logged in yet. I think something is odd there, possible combined with user lingering and perhaps plasma-core being the default target for your user when it shouldn't be...
> >
> > Hope this helps you debug things.
>
> Yes, that helped.
>
> plasma-core.target isn't the correct target.  I switched to graphical-session.target.
>
> I believe one issue remains.
>
> On login, after a reboot, the app is started.  And, on logout the app is terminated.
>
> The issue is that if the user logs out and logs back in the service is not run.
>
> How to make sure the service is run each time the user logs in?
>
>