I just ran into this today:
Setting up avahi-utils (0.7-3.1ubuntu1) ...
dpkg: cycle found while processing triggers:
chain of packages whose triggers are or may be responsible:
gnome-menus -> ufw
packages' pending triggers which are or may be unresolvable:
gnome-menus: /usr/share/applications
libc-bin: ldconfig
shim-signed: shim-secureboot-policy
gconf2: /usr/share/GConf/gsettings: /usr/share/gconf/schemas
ufw: /etc/ufw/applications.d
dpkg: error processing package gnome-menus (--configure):
triggers looping, abandoned
...
Errors were encountered while processing:
gnome-menus
...
Setting up gnome-menus (3.13.3-11ubuntu1) ...
...
Errors were encountered while processing:^M
gnome-menus^M
E: Sub-process /usr/bin/dpkg returned an error code (1)
** Attachment added: "log of apt-get dist-upgrade with failure"
https://bugs.launchpad.net/ubuntu/+source/gnome-menus/+bug/1738194/+attachment/5053607/+files/failed-upgrade.txt
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Packages, which is subscribed to gnome-menus in Ubuntu.
https://bugs.launchpad.net/bugs/1738194
Title:
gnome-menus 3.13.3-6ubuntu5 failed to install/upgrade: triggers
looping, abandoned - gnome-menus -> gconf2
Status in gnome-menus package in Ubuntu:
Confirmed
Bug description:
apt log session:
...
dpkg: a cycle was encountered while processing the triggers:
the packet chain of these triggers are or may be responsible:
gnome-menus -> gconf2
triggers of pending packets that are or may be insoluble:
gnome-menus: / usr / share / applications
libc-bin: ldconfig
gconf2: / usr / share / GConf / gsettings
dpkg: error processing package gnome-menus (--configure):
loop triggers, abandoned
...
$ systemctl status apport.service
● apport.service - LSB: automatic crash report generation
Loaded: loaded (/etc/init.d/apport; generated; vendor preset: enabled)
Active: failed (Result: timeout) since Thu 2017-12-14 08:43:36 -02; 1h
14min ago
Docs: man:systemd-sysv-generator(8)
Tasks: 1 (limit: 4915)
CGroup: /system.slice/apport.service
└─9190 plymouth --ping
dez 14 08:38:36 etm systemd[1]: Starting LSB: automatic crash report
generation...
dez 14 08:43:36 etm systemd[1]: apport.service: Start operation timed out.
Terminating.
dez 14 08:43:36 etm systemd[1]: apport.service: Failed with result 'timeout'.
dez 14 08:43:36 etm systemd[1]: Failed to start LSB: automatic crash report
generation.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gnome-menus 3.13.3-6ubuntu5
ProcVersionSignature: Ubuntu 4.14.0-11.13-generic 4.14.3
Uname: Linux 4.14.0-11-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.8-0ubuntu4
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Thu Dec 14 09:50:52 2017
Dependencies:
InstallationDate: Installed on 2017-09-29 (75 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Beta amd64 (20170929)
SourcePackage: gnome-menus
UpgradeStatus: No upgrade log present (probably fresh install)
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https://bugs.launchpad.net/ubuntu/+source/gnome-menus/+bug/1738194/+subscriptions
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