session-management: mention dbus-update-activation-environment

[ericonr]

Necessary, for example, to allow gnome-keyring-daemon to launch prompts
for user interaction, since the prompts are launched by the dbus daemon.

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[ericonr]

@steinex iirc we talked about this when I mentioned my service that had a sleep 4 in the middle :p

Does it look ok?

[steinex]

I think it's not actionable enough - imo audience should be told to run it as part of their (sway|X11 wm) config so that it's called after their Wayland/X session is up.

Then for sway, you also want XDG_CURRENT_DESKTOP=sway (but I forgot why and i'm not sure if is important to mention / in scope, iirc it was for portal-wlr).

Other than that: thanks! :-)

[ericonr]

Thanks, I will try to include some guidance on when to run it.

Portal-wlr does need the current desktop var, I will try to sneak in something about "other applicable variables" (though for my usage I just launch dbus-run-session with that one set already).