I was unable to recreate this bug when upgrading from Ubuntu 17.10 to Ubuntu 18.04 today with the packages bamfdaemon and gnome-icon-theme installed.
bdmurray@clean-artful-amd64:~$ ls -lh /var/log/dist-upgrade/ total 3.0M drwxr-xr-x 2 root root 4.0K Apr 2 14:51 20180402-1451 -rw------- 1 root root 449K Apr 2 14:51 apt-clone_system_state.tar.gz -rw-r--r-- 1 root root 39K Apr 2 15:03 apt.log -rw-r----- 1 root adm 351K Apr 2 15:10 apt-term.log -rw-r--r-- 1 root root 60K Apr 2 15:10 eipp.log.xz -rw-r--r-- 1 root root 67K Apr 2 15:10 history.log -rw-r--r-- 1 root root 1.4K Apr 2 14:51 lspci.txt -rw-r--r-- 1 root root 45K Apr 2 15:10 main.log -rw-r--r-- 1 root root 2.0M Apr 2 15:13 screenlog.0 bdmurray@clean-artful-amd64:~$ grep "dpkg: cycle" /var/log/dist-upgrade/apt-term.log bdmurray@clean-artful-amd64:~$ grep "triggers looping" /var/log/dist-upgrade/apt-term.log ** Changed in: ubuntu-release-upgrader (Ubuntu Bionic) Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1742147 Title: upgrade from 17.10 to 18.04 fails with triggers looping To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1742147/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs