Here are the warnings and messages I get when upgrading systemd 232-21-ubuntu3 => 233-5ubuntu1 with synaptic:
Job for systemd-journald.service failed because the service did not take the steps required by its unit configuration. See "systemctl status systemd-journald.service" and "journalctl -xe" for details. Removing obsolete conffile /etc/dbus-1/system.d/org.freedesktop.hostname1.conf ... Removing obsolete conffile /etc/dbus-1/system.d/org.freedesktop.locale1.conf ... Removing obsolete conffile /etc/dbus-1/system.d/org.freedesktop.login1.conf ... Removing obsolete conffile /etc/dbus-1/system.d/org.freedesktop.network1.conf ... Removing obsolete conffile /etc/dbus-1/system.d/org.freedesktop.resolve1.conf ... Removing obsolete conffile /etc/dbus-1/system.d/org.freedesktop.systemd1.conf ... Removing obsolete conffile /etc/dbus-1/system.d/org.freedesktop.timedate1.conf ... ... Removing obsolete conffile /etc/init/udev.conf ... Removing obsolete conffile /etc/init/udevmonitor.conf ... Removing obsolete conffile /etc/init/udevtrigger.conf ... Processing triggers for dbus (1.10.10-1ubuntu2) ...
And, when downgrading back to 232-21ubuntu3 there are no such warnings nor messages.
Losing the network DNS may have something to do with those "removing the obsolete conffile /etc/d-bus1/..." messages.
Here are the warnings and messages I get when upgrading systemd 232-21-ubuntu3 => 233-5ubuntu1 with synaptic:
Job for systemd- journald. service failed because the service did not take the steps required by its unit configuration. journald. service" and "journalctl -xe" for details. 1/system. d/org.freedeskt op.hostname1. conf ... 1/system. d/org.freedeskt op.locale1. conf ... 1/system. d/org.freedeskt op.login1. conf ... 1/system. d/org.freedeskt op.network1. conf ... 1/system. d/org.freedeskt op.resolve1. conf ... 1/system. d/org.freedeskt op.systemd1. conf ... 1/system. d/org.freedeskt op.timedate1. conf ... udevmonitor. conf ... udevtrigger. conf ...
See "systemctl status systemd-
Removing obsolete conffile /etc/dbus-
Removing obsolete conffile /etc/dbus-
Removing obsolete conffile /etc/dbus-
Removing obsolete conffile /etc/dbus-
Removing obsolete conffile /etc/dbus-
Removing obsolete conffile /etc/dbus-
Removing obsolete conffile /etc/dbus-
...
Removing obsolete conffile /etc/init/udev.conf ...
Removing obsolete conffile /etc/init/
Removing obsolete conffile /etc/init/
Processing triggers for dbus (1.10.10-1ubuntu2) ...
And, when downgrading back to 232-21ubuntu3 there are no such warnings nor messages.
Losing the network DNS may have something to do with those
"removing the obsolete conffile /etc/d-bus1/..."
messages.