Comment 14 for bug 1911187

# VERIFICATION BIONIC

Installed systemd from -proposed :
# dpkg -l | grep systemd
ii libnss-resolve:amd64 237-3ubuntu10.45 amd64 nss module to resolve names via systemd-resolved
ii libnss-systemd:amd64 237-3ubuntu10.45 amd64 nss module providing dynamic user and group name resolution
ii libpam-systemd:amd64 237-3ubuntu10.45 amd64 system and service manager - PAM module
ii libsystemd-dev:amd64 237-3ubuntu10.45 amd64 systemd utility library - development files
ii libsystemd0:amd64 237-3ubuntu10.45 amd64 systemd utility library
ii networkd-dispatcher 1.7-0ubuntu3.3 all Dispatcher service for systemd-networkd connection status changes
ii python3-systemd 234-1build1 amd64 Python 3 bindings for systemd
ii systemd 237-3ubuntu10.45 amd64 system and service manager
ii systemd-container 237-3ubuntu10.45 amd64 systemd container/nspawn tools
ii systemd-journal-remote 237-3ubuntu10.45 amd64 tools for sending and receiving remote journal logs
ii systemd-sysv 237-3ubuntu10.45 amd64 system and service manager - SysV links
ii systemd-tests 237-3ubuntu10.45 amd64 tests for systemd

Following test plan from description

# systemctl stop dbus.service
# systemctl stop dbus.socket
# shutdown +1 -r "REBOOT!"
Failed to set wall message, ignoring: Refusing activation, D-Bus is shutting down.
Failed to call ScheduleShutdown in logind, no action will be taken: Refusing activation, D-Bus is shutting down.

Machine does not reboot as expected.