This happened to me upgrading from Artful.
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Touch seeded packages, which is subscribed to resolvconf in Ubuntu.
package resolvconf 1.79ubuntu9 failed to install/upgrade: triggers
Status in resolvconf package in Ubuntu:
Happened on upgrade to bionic on 2/2.
DistroRelease: Ubuntu 18.04
Package: resolvconf 1.79ubuntu9
ProcVersionSignature: Ubuntu 4.13.0-32.35-generic 4.13.13
Uname: Linux 4.13.0-32-generic x86_64
Date: Sat Feb 3 00:58:50 2018
ErrorMessage: triggers looping, abandoned
InstallationDate: Installed on 2015-08-19 (899 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150818)
Python3Details: /usr/bin/python3.6, Python 3.6.4, python3-minimal,
PythonDetails: /usr/bin/python2.7, Python 2.7.14+, python-minimal,
Title: package resolvconf 1.79ubuntu9 failed to install/upgrade: triggers
UpgradeStatus: Upgraded to bionic on 2018-02-03 (0 days ago)
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