** Also affects: dbus (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: systemd (Ubuntu Focal)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1917298
Title:
dbus-daemon not started after reboot
Status in dbus package in Ubuntu:
New
Status in systemd package in Ubuntu:
New
Status in dbus source package in Focal:
New
Status in systemd source package in Focal:
New
Bug description:
In the past weeks we experienced few systems coming up without started
dbus-daemon after reboots due to updates.
The first occurrence happens on January 21th 2021, since this time we
were experiencing 0 up to 2 machines with this issue on each reboot
cycle affecting all (approx 20) Ubuntu 20.4 (Focal Fossa) LTS
machines.
On January 21th the machines were rebooted due to a kernel update. On
January 19th there were updates for systemd (systemd:amd64 from
245.4-4ubuntu3.3 undated to 245.4-4ubuntu3.4) installed.
The Symptoms seem to be:
```
root@es1:~# systemctl status dbus
● dbus.service - D-Bus System Message Bus
Loaded: loaded (/lib/systemd/system/dbus.service; static; vendor preset:
enabled)
Active: inactive (dead)
TriggeredBy: ● dbus.socket
Docs: man:dbus-daemon(1)
```
There is no `dbus-daemon` process running any more after reboot.
The messages in /var/log/syslog:
```
Feb 24 09:21:52 runner1 kernel: [ 11.005391] systemd[1]: sockets.target:
Found ordering cycle on dbus.socket/start
[...]
Feb 24 09:21:52 runner1 kernel: [ 11.012386] systemd[1]: sockets.target:
Job dbus.socket/start deleted to break ordering cycle starting with
sockets.target/start
```
Jounalctl output ends with the dbus-Shutdown before reboot, and it is
not updated any more.
When rebooting the affected machine again, this does'nt occur again,
and the dbus-daemon is started and working again. We experienced this
on 4 rather different machines on 6 reboot cycles across all Ubuntu
20.4 (Focal Fossa) LTS machines till now.
We are not experiencing this on other LTS releases than 20.4.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/dbus/+bug/1917298/+subscriptions
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