Hello Joachim Breitner! Your problem with quitting the session is likely because nothing is listening on the DBus API called by gnome-session (if you're not running gnome-shell).
Upstream is working on making gnome components not rely on X (to support running on top of Wayland instead). I've also heard that gnome 3.8 was the last upstream release supporting the fallback session. (Likely because everybody seems to prefer forking over actually helping keeping it alive.) This commit was included in gnome-shell 3.10 which is relevant to your problem: https://git.gnome.org/browse/gnome-session/commit/gnome-session/gsm-manager.c?id=705699b2799a3434d1a8f35c9a92868a5057f73e I guess you have two options here.... short term it might work to revert the above commit for you, but I think that will become increasingly hard to maintain. better solution would be to implement something to listen to the correct set of DBus API to show the poweroff/reboot/logout dialog depending on which component you think should be in charge of that graphical details. If you're interested in helping out maintaining the fallback session that help is very welcome. Please visit #debian-gnome on irc.debian.org. Hope there hints helps you find a solution. Regards, Andreas Henriksson -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org