Some loops between services while upgrading through apt

[simone]

While I try to upgrade my Ubuntu through "apt upgrade", it gives me many errors involving loops between services (insserv gives me the output).
I've tried to purge grub-common and make upgrade again -> no result.
I'm not able to understand well what's happening.

The error is raised after an upgrade of ~400MB today. Some packets have been correctly installed. These others (listed in the attached file, at the bottom of it), raises an error.

Thank you for you effort in resolving this bug guys !!!

insserv: warning: script 'S99runmbbservice' missing LSB tags and overrides
insserv: warning: script 'runmbbservice' missing LSB tags and overrides
insserv: There is a loop at service plymouth if started
insserv: There is a loop between service plymouth and procps if started
insserv: loop involving service procps at depth 2
insserv: loop involving service udev at depth 1
insserv: There is a loop between service plymouth and urandom if started
insserv: loop involving service urandom at depth 4
insserv: loop involving service hwclock at depth 3
insserv: There is a loop between service runmbbservice and mountkernfs if started
insserv: loop involving service mountkernfs at depth 1
insserv: There is a loop at service runmbbservice if started
insserv: Starting runmbbservice depends on plymouth and therefore on system facility `$all' which can not be true!

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: keyboard-configuration 1.108ubuntu15.4
ProcVersionSignature: Ubuntu 4.13.0-45.50~16.04.1-generic 4.13.16
Uname: Linux 4.13.0-45-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
Date: Thu Jun 14 12:50:19 2018
ErrorMessage: il sottoprocesso installato script di post-installation ha restituito lo stato di errore 1
InstallationDate: Installed on 2018-02-02 (131 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
PackageArchitecture: all
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.4
 apt 1.2.26
SourcePackage: console-setup
Title: package keyboard-configuration 1.108ubuntu15.4 failed to install/upgrade: il sottoprocesso installato script di post-installation ha restituito lo stato di errore 1
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.init.d.keyboard-setup: [deleted]

[simone (simofux)]

It seems I've resolved using theese commands:

for fil in $(cat file_list_of_errored_packets);do rm /var/lib/dpkg/info/${fil}.postinst; done
apt install -f

Now I get no errors anymore ... I will be back just to confirm or discard the resolution of this bug