In the original report, the issue happened randomly on boot when a service[1] was triggering a reload while systemd-logind was starting, resulting in a list of queued jobs that were never executed.
The issue can happen too under high load conditions, as reported upstream: https://github.com/systemd/systemd/issues/12956 To simplify the reproducer I went with systemd-logind+daemon-reload, but it can be done with any other dbus service. [1] [Unit] Description=Disable unattended upgrades After=network-online.target local-fs.target [Service] Type=oneshot ExecStart=/bin/bash -c "/bin/chmod 644 /etc/cron.daily/apt-compat ; /bin/systemctl disable apt-daily-upgrade.timer apt-daily.timer ; /bin/systemctl stop apt-daily-upgrade.timer apt-daily.timer" [Install] WantedBy=multi-user.target ** Bug watch added: github.com/systemd/systemd/issues #12956 https://github.com/systemd/systemd/issues/12956 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1896614 Title: Race condition when starting dbus services To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1896614/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs