Fedora 24 has now configured the session DBus to be shared between all active sessions for the same user. I.e: DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus rather than Fedora 23's: DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus-0HpbO1JUYG,guid=39f9c10acfd5ea432be0666e57762986 Besides breaking the fundamental issue of this being a _session_ bus, not a _user_ bus, this causes programs to misbehave. Most prominent example is gnome-terminal, which now fails to start on anything but the local, default X server. E.g. logging in over ssh breaks it. Starting an Xvnc breaks it. etc. I assume the only reason it works locally is because $DISPLAY is transferred over and the local X server is configured to allow all local connections with the same user. Output in ssh session: [cendio@dhcp-253-45 ~]$ gnome-terminal Error constructing proxy for org.gnome.Terminal:/org/gnome/Terminal/Factory0: Error calling StartServiceByName for org.gnome.Terminal: Timeout was reached And in the journal: Jul 08 15:21:18 dhcp-253-45.lkpg.cendio.se systemd[1620]: Started D-Bus User Message Bus. Jul 08 15:21:18 dhcp-253-45.lkpg.cendio.se dbus-daemon[1780]: Activating via systemd: service name='org.gtk.vfs.Daemon' unit='gvfs-daemon.service' Jul 08 15:21:18 dhcp-253-45.lkpg.cendio.se systemd[1620]: Starting Virtual filesystem service... Jul 08 15:21:18 dhcp-253-45.lkpg.cendio.se dbus-daemon[1780]: Successfully activated service 'org.gtk.vfs.Daemon' Jul 08 15:21:18 dhcp-253-45.lkpg.cendio.se systemd[1620]: Started Virtual filesystem service. Jul 08 15:21:19 dhcp-253-45.lkpg.cendio.se dbus-daemon[1780]: Activating via systemd: service name='org.gnome.Terminal' unit='gnome-terminal-server.service' Jul 08 15:21:19 dhcp-253-45.lkpg.cendio.se systemd[1620]: Starting GNOME Terminal Server... Jul 08 15:21:19 dhcp-253-45.lkpg.cendio.se gnome-terminal-server[1797]: Unable to init server: Kunde inte ansluta: Connection refused Jul 08 15:21:19 dhcp-253-45.lkpg.cendio.se gnome-terminal-server[1797]: Failed to parse arguments: Kan inte öppna display: Jul 08 15:21:19 dhcp-253-45.lkpg.cendio.se systemd[1620]: gnome-terminal-server.service: Main process exited, code=exited, status=10/n/a Jul 08 15:21:19 dhcp-253-45.lkpg.cendio.se systemd[1620]: Failed to start GNOME Terminal Server. Jul 08 15:21:19 dhcp-253-45.lkpg.cendio.se systemd[1620]: gnome-terminal-server.service: Unit entered failed state. Jul 08 15:21:19 dhcp-253-45.lkpg.cendio.se systemd[1620]: gnome-terminal-server.service: Failed with result 'exit-code'. In a ThinLinc/VNC session it gets worse: Nautilus: jul 08 15:41:52 dhcp-253-45.lkpg.cendio.se dbus-daemon[1880]: Activating service name='org.gnome.Nautilus' jul 08 15:41:52 dhcp-253-45.lkpg.cendio.se dbus-daemon[1880]: Successfully activated service 'org.gnome.Nautilus' jul 08 15:41:52 dhcp-253-45.lkpg.cendio.se org.gnome.Nautilus[1880]: Unable to init server: Kunde inte ansluta: Connection refused jul 08 15:41:52 dhcp-253-45.lkpg.cendio.se org.gnome.Nautilus[1880]: (nautilus:2539): Gtk-WARNING **: cannot open display: gnome-clocks: jul 08 15:42:03 dhcp-253-45.lkpg.cendio.se dbus-daemon[1880]: Activating service name='org.gnome.clocks' jul 08 15:42:03 dhcp-253-45.lkpg.cendio.se dbus-daemon[1880]: Successfully activated service 'org.gnome.clocks' jul 08 15:42:03 dhcp-253-45.lkpg.cendio.se org.gnome.clocks[1880]: Unable to init server: Kunde inte ansluta: Connection refused jul 08 15:42:03 dhcp-253-45.lkpg.cendio.se org.gnome.clocks[1880]: (gnome-clocks:2556): Gtk-WARNING **: cannot open display: gnome-documents: jul 08 15:42:07 dhcp-253-45.lkpg.cendio.se dbus-daemon[1880]: Activating service name='org.gnome.Documents' jul 08 15:42:08 dhcp-253-45.lkpg.cendio.se dbus-daemon[1880]: Successfully activated service 'org.gnome.Documents' jul 08 15:42:08 dhcp-253-45.lkpg.cendio.se org.gnome.Documents[1880]: Unable to init server: Kunde inte ansluta: Connection refused jul 08 15:42:08 dhcp-253-45.lkpg.cendio.se org.gnome.Documents[1880]: (org.gnome.Documents:2566): Gtk-WARNING **: cannot open display: Doing an strace shows attempts to reach Wayland and Broadway, but not the proper X server: [cendio@dhcp-253-45 ~]$ sudo strace -e connect -f -p 1880 strace: Process 1880 attached with 2 threads [pid 1880] connect(55, {sa_family=AF_LOCAL, sun_path="/run/systemd/journal/stdout"}, 29) = 0 [pid 1880] connect(56, {sa_family=AF_LOCAL, sun_path="/run/systemd/journal/stdout"}, 29) = 0 strace: Process 2658 attached strace: Process 2659 attached [pid 2659] connect(4, {sa_family=AF_LOCAL, sun_path="/run/user/1000/bus"}, 110) = 0 strace: Process 2660 attached strace: Process 2661 attached [pid 2658] +++ killed by SIGKILL +++ [pid 1880] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=2658, si_uid=1000, si_status=SIGKILL, si_utime=0, si_stime=0} --- [pid 2659] connect(7, {sa_family=AF_LOCAL, sun_path="/run/user/1000/wayland-0"}, 27) = -1 ENOENT (No such file or directory) [pid 2659] connect(7, {sa_family=AF_LOCAL, sun_path=@"/run/user/1000/broadway1.socket"}, 34) = -1 ECONNREFUSED (Connection refused) [pid 2660] +++ exited with 1 +++ [pid 2661] +++ exited with 1 +++ [pid 2659] +++ exited with 1 +++
I'm seeing the same wayland/broadway thing with gnome-terminal-server, but I have to strace systemd instead of dbus-daemon in that case.
Restoring a session specific bus makes the problems go away: DBUS_SESSION_BUS_ADDRESS="" eval `dbus-launch --sh-syntax --exit-with-session`
Bug 1281675 seems to also be about this problem, although perhaps from a different perspective.
It did reveal dbus-update-activation-environment however. And I hence discovered /etc/X11/xinit/xinitrc.d/50-systemd-user.sh. Running that fixes the ThinLinc/VNC case, but not SSH. And that's because $XAUTHORITY isn't set for SSH. But first setting it, and then running the script; that fixes the issue. Looks like more work is needed before this idea is ready for general use. Any easy way to back out this change from systemd? (And I still think it's a bad idea to repurpose the session bus. Feel free to add a new user bus, but don't go changing the scope of an existing bus.)
Another bug caused by this is that the language setting is not respected since $LANG is set by GDM, but gnome-terminal, nautilus, etc. are spawned by systemd and hence use the system $LANG. So half my UI is in the system language, and half is in the user language.
I think it may have broken Evolution too (no mail after logging into user account more than once), see GNOME #768680.
this is a dbus change not a systemd change, correcting component.
Note that the "fix" in upstream Gnome only solves the issue when you are using a Gnome desktop. Gnome applications such as totem are still broken on other desktops, e.g. Mate.
And today I noticed that Xfce is broken since xfce4-notifyd fails to start: > Feb 27 15:48:49 ossman.lkpg.cendio.se dbus-daemon[18959]: [session uid=1016 pid=18959] Activating via systemd: service name='org.freedesktop.Notifications' unit='xfce4-notifyd.service' requested by ':1.60' (uid=1016 pid=19709 comm="/usr/bin/python3 /bin/d-feet " label="unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023") > Feb 27 15:48:49 ossman.lkpg.cendio.se systemd[18763]: Starting XFCE notifications service... > Feb 27 15:48:49 ossman.lkpg.cendio.se xfce4-notifyd[19886]: Unable to init server: Could not connect: Connection refused > Feb 27 15:48:49 ossman.lkpg.cendio.se xfce4-notifyd[19886]: cannot open display: > Feb 27 15:48:49 ossman.lkpg.cendio.se systemd[18763]: xfce4-notifyd.service: Main process exited, code=exited, status=1/FAILURE > Feb 27 15:48:49 ossman.lkpg.cendio.se systemd[18763]: Failed to start XFCE notifications service. > Feb 27 15:48:49 ossman.lkpg.cendio.se systemd[18763]: xfce4-notifyd.service: Unit entered failed state. > Feb 27 15:48:49 ossman.lkpg.cendio.se systemd[18763]: xfce4-notifyd.service: Failed with result 'exit-code'. > Feb 27 15:50:49 ossman.lkpg.cendio.se dbus-daemon[18959]: [session uid=1016 pid=18959] Failed to activate service 'org.freedesktop.Notifications': timed out (service_start_timeout=120000ms)
I just ran into this today myself. On Fedora 25. I had to unset DBUS_SESSION_BUS_ADDRESS in order to run apps on Xming over PuTTY.
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