Nie udało się w pełni uruchomić demona: przekroczono limit czasu połączenia

Zaczęło się to dziać po kilku aktualizacjach Ubuntu. Za każdym razem, gdy logujesz się do tego serwera za pomocą klienta LDAP lub użytkownika lokalnego, uwierzytelnianie i logowanie zajmuje dużo czasu.
/var/log/auth.log:

Jan 14 06:19:16 norwich systemd-logind[18114]: Failed to fully start up daemon: Connection timed out

Jan 14 06:19:41 norwich systemd-logind[18225]: Failed to enable subscription: Connection timed out

Jan 14 06:19:41 norwich systemd-logind[18225]: Failed to fully start up daemon: Connection timed out

Jan 14 06:19:41 norwich dbus[929]: [system] Failed to activate service 'org.freedesktop.systemd1': timed out

Jan 14 06:20:06 norwich systemd-logind[18329]: Failed to enable subscription: Connection timed out

Jan 14 06:20:06 norwich systemd-logind[18329]: Failed to fully start up daemon: Connection timed out

Jan 14 06:20:06 norwich dbus[929]: [system] Failed to activate service 'org.freedesktop.systemd1': timed out

Jan 14 06:20:31 norwich systemd-logind[18441]: Failed to enable subscription: Connection timed out

Jan 14 06:20:31 norwich dbus[929]: [system] Failed to activate service 'org.freedesktop.systemd1': timed out

Jan 14 06:20:31 norwich systemd-logind[18441]: Failed to fully start up daemon: Connection timed out

Jan 14 06:20:56 norwich systemd-logind[18552]: Failed to enable subscription: Connection timed out

Jan 14 06:20:56 norwich dbus[929]: [system] Failed to activate service 'org.freedesktop.systemd1': timed out

Jan 14 06:20:56 norwich systemd-logind[18552]: Failed to fully start up daemon: Connection timed out

Jan 14 06:21:21 norwich systemd-logind[18665]: Failed to enable subscription: Connection timed out

Jan 14 06:21:21 norwich systemd-logind[18665]: Failed to fully start up daemon: Connection timed out

Jan 14 06:21:21 norwich dbus[929]: [system] Failed to activate service 'org.freedesktop.systemd1': timed out

Serwer korzysta z Ubuntu 16.04 LTS i:

Linux norwich 4.4.0-109-generic #132-Ubuntu SMP Tue Jan 9 19:52:39 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

Zrestartowałem już serwer bez skutku.
Oto dziennik dziennika:

Jan 15 13:01:03 norwich dbus[929]: [system] Failed to activate service 'org.freedesktop.systemd1': timed out

Jan 15 13:01:03 norwich systemd[1]: systemd-logind.service: Main process exited, code=exited, status=1/FAILURE

Jan 15 13:01:03 norwich systemd[1]: Failed to start Login Service.

Jan 15 13:01:03 norwich systemd[1]: systemd-logind.service: Unit entered failed state.

Jan 15 13:01:03 norwich systemd[1]: systemd-logind.service: Failed with result 'exit-code'.

Jan 15 13:01:03 norwich systemd[1]: systemd-logind.service: Service has no hold-off time, scheduling restart.

Jan 15 13:01:03 norwich systemd[1]: Stopped Login Service.

Jan 15 13:01:03 norwich systemd[1]: Starting Login Service...

Jan 15 13:01:03 norwich systemd[1]: Failed to forward Released message: No buffer space available

Jan 15 13:01:03 norwich systemd[1]: Failed to forward Released message: No buffer space available

Jan 15 13:01:28 norwich systemd-logind[11142]: Failed to enable subscription: Connection timed out

Jan 15 13:01:28 norwich systemd-logind[11142]: Failed to fully start up daemon: Connection timed out

Jan 15 13:01:28 norwich dbus[929]: [system] Failed to activate service 'org.freedesktop.systemd1': timed out

Jan 15 13:01:28 norwich systemd[1]: systemd-logind.service: Main process exited, code=exited, status=1/FAILURE

Jan 15 13:01:28 norwich systemd[1]: Failed to start Login Service.

Jan 15 13:01:28 norwich systemd[1]: systemd-logind.service: Unit entered failed state.

Jan 15 13:01:28 norwich systemd[1]: systemd-logind.service: Failed with result 'exit-code'.

Jan 15 13:01:28 norwich systemd[1]: systemd-logind.service: Service has no hold-off time, scheduling restart.

Jan 15 13:01:28 norwich systemd[1]: Stopped Login Service.

Jan 15 13:01:28 norwich systemd[1]: Starting Login Service...

Jan 15 13:01:28 norwich systemd[1]: Failed to forward Released message: No buffer space available

Jan 15 13:01:53 norwich dbus[929]: [system] Failed to activate service 'org.freedesktop.systemd1': timed out

Jan 15 13:01:53 norwich systemd-logind[11146]: Failed to enable subscription: Failed to activate service 'org.freedesktop.systemd1': timed out

Jan 15 13:01:53 norwich systemd-logind[11146]: Failed to fully start up daemon: Connection timed out

Jan 15 13:01:53 norwich systemd[1]: systemd-logind.service: Main process exited, code=exited, status=1/FAILURE

Jan 15 13:01:53 norwich systemd[1]: Failed to start Login Service.

Jan 15 13:01:53 norwich systemd[1]: systemd-logind.service: Unit entered failed state.

Jan 15 13:01:53 norwich systemd[1]: systemd-logind.service: Failed with result 'exit-code'.

Jan 15 13:01:53 norwich systemd[1]: systemd-logind.service: Service has no hold-off time, scheduling restart.

Jan 15 13:01:53 norwich systemd[1]: Stopped Login Service.

Jan 15 13:01:53 norwich systemd[1]: Starting Login Service...

Jan 15 13:01:53 norwich systemd[1]: Failed to forward Released message: No buffer space available

Jan 15 13:02:18 norwich systemd-logind[11150]: Failed to enable subscription: Connection timed out

Jan 15 13:02:18 norwich dbus[929]: [system] Failed to activate service 'org.freedesktop.systemd1': timed out

Jan 15 13:02:18 norwich systemd-logind[11150]: Failed to fully start up daemon: Connection timed out

Jan 15 13:02:18 norwich systemd[1]: systemd-logind.service: Main process exited, code=exited, status=1/FAILURE

Jan 15 13:02:18 norwich systemd[1]: Failed to start Login Service.