Could you try this using lightdm? It's possible that this may be a
display-manager issue.
I did notice that in a different (customized) configuration of Xubuntu,
the user processes still remained after logout, but then killing the
"systemd --user" process resulted in the login session ending.
Anyway, here is the output you requested, in the original test
environment:
# LC_ALL=C loginctl user-status skunk | cat
skunk (1000)
Since: Fri 2020-04-10 18:40:19 EDT; 3min 11s ago
State: closing
Sessions: *c2
Linger: no
Unit: user-1000.slice
|-session-c2.scope
| |-1288 /usr/libexec/geoclue-2.0/demos/agent
| `-1345 /usr/bin/python3
/usr/share/system-config-printer/applet.py
`-user@1000.service
|-at-spi-dbus-bus.service
| |-1131 /usr/libexec/at-spi-bus-launcher
| `-1136 /usr/bin/dbus-daemon
--config-file=/usr/share/defaults/at-spi2/accessibility.conf --nofork
--print-address 3
|-dbus.service
| |-1042 /usr/bin/dbus-daemon --session --address=systemd:
--nofork --nopidfile --systemd-activation --syslog-only
| |-1140 /usr/lib/x86_64-linux-gnu/xfce4/xfconf/xfconfd
| |-1291 /usr/lib/x86_64-linux-gnu/tumbler-1/tumblerd
| |-1302 /usr/libexec/dconf-service
| |-1391 /usr/libexec/goa-daemon
| `-1404 /usr/libexec/goa-identity-service
|-evolution-addressbook-factory.service
| `-1438 /usr/libexec/evolution-addressbook-factory
|-evolution-calendar-factory.service
| `-1396 /usr/libexec/evolution-calendar-factory
|-evolution-source-registry.service
| `-1374 /usr/libexec/evolution-source-registry
|-gvfs-afc-volume-monitor.service
| `-1501 /usr/libexec/gvfs-afc-volume-monitor
|-gvfs-daemon.service
| |-1153 /usr/libexec/gvfsd
| |-1158 /usr/libexec/gvfsd-fuse /run/user/1000/gvfs -f -o
big_writes
| `-1509 /usr/libexec/gvfsd-trash --spawner :1.13
/org/gtk/gvfs/exec_spaw/0
|-gvfs-goa-volume-monitor.service
| `-1497 /usr/libexec/gvfs-goa-volume-monitor
|-gvfs-gphoto2-volume-monitor.service
| `-1493 /usr/libexec/gvfs-gphoto2-volume-monitor
|-gvfs-metadata.service
| `-1515 /usr/libexec/gvfsd-metadata
|-gvfs-mtp-volume-monitor.service
| `-1489 /usr/libexec/gvfs-mtp-volume-monitor
|-gvfs-udisks2-volume-monitor.service
| `-1484 /usr/libexec/gvfs-udisks2-volume-monitor
|-init.scope
| |-1017 /lib/systemd/systemd --user
| `-1018 (sd-pam)
`-obex.service
`-1464 /usr/lib/bluetooth/obexd
Apr 10 18:41:21 test-ubuntu64 systemd[1017]: Stopped Indicator Application
Service.
Apr 10 18:41:21 test-ubuntu64 systemd[1017]: indicator-keyboard.service:
Succeeded.
Apr 10 18:41:21 test-ubuntu64 systemd[1017]: Stopped Indicator Keyboard Backend.
Apr 10 18:41:21 test-ubuntu64 systemd[1017]: Stopping Indicator Session
Service...
Apr 10 18:41:21 test-ubuntu64 systemd[1017]: indicator-session.service:
Succeeded.
Apr 10 18:41:21 test-ubuntu64 systemd[1017]: Stopped Indicator Session Service.
Apr 10 18:41:22 test-ubuntu64 indicator-sound[1250]: g_object_ref: assertion
'old_val > 0' failed
Apr 10 18:41:22 test-ubuntu64 systemd[1017]: pulseaudio.service: Succeeded.
Apr 10 18:41:22 test-ubuntu64 systemd[1017]: indicator-sound.service: Succeeded.
Apr 10 18:41:22 test-ubuntu64 systemd[1017]: Stopped Indicator Sound Service.
----------------
If I kill the "systemd --user" process, the output slims down to this:
# LC_ALL=C loginctl user-status skunk | cat
skunk (1000)
Since: Fri 2020-04-10 18:40:19 EDT; 5min ago
State: closing
Sessions: *c2
Linger: no
Unit: user-1000.slice
`-session-c2.scope
`-1288 /usr/libexec/geoclue-2.0/demos/agent
Apr 10 18:45:14 test-ubuntu64 systemd[1017]: pk-debconf-helper.socket:
Succeeded.
Apr 10 18:45:14 test-ubuntu64 systemd[1017]: Closed debconf communication
socket.
Apr 10 18:45:14 test-ubuntu64 systemd[1017]: pulseaudio.socket: Succeeded.
Apr 10 18:45:14 test-ubuntu64 systemd[1017]: Closed Sound System.
Apr 10 18:45:14 test-ubuntu64 systemd[1017]: snapd.session-agent.socket:
Succeeded.
Apr 10 18:45:14 test-ubuntu64 systemd[1017]: Closed REST API socket for snapd
user session agent.
Apr 10 18:45:14 test-ubuntu64 systemd[1017]: Reached target Shutdown.
Apr 10 18:45:14 test-ubuntu64 systemd[1017]: systemd-exit.service: Succeeded.
Apr 10 18:45:14 test-ubuntu64 systemd[1017]: Finished Exit the Session.
Apr 10 18:45:14 test-ubuntu64 systemd[1017]: Reached target Exit the Session.
----------------
I have reported the issue with geoclue-2.0 as LP#1871728.
If I SIGHUP that process, then the user session finally goes away. (My
customized environment does not have geoclue-2.0 installed, so that
might explain the difference.)
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https://bugs.launchpad.net/bugs/1871726
Title:
"systemd --user" and child processes fail to exit when user logs out
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