I have quite old instalation of Ubuntu, regulary upgrading to LTS. Last I did common package update via Discover I've got all broken.
Simple apt install got me this:
apt install firefox
...
...
dpkg: error processing package udev (--configure):
installed udev package post-installation script subprocess returned error exit status 1
dpkg: dependency problems prevent configuration of snapd:
snapd depends on udev; however:
Package udev is not configured yet.
dpkg: error processing package snapd (--configure):
dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup error from a previous failure.
Errors were encountered while processing:
udev
snapd
E: Sub-process /usr/bin/dpkg returned an error code (1)
Fixing it with dpkg does not work either
# dpkg --configure udev
Setting up udev (249.11-0ubuntu3.9) ...
The group `kvm' already exists and is not a system group. Exiting.
dpkg: error processing package udev (--configure):
installed udev package post-installation script subprocess returned error exit status 1
Errors were encountered while processing:
udev
dpkg --configure snapd
dpkg: dependency problems prevent configuration of snapd:
snapd depends on udev; however:
Package udev is not configured yet.
dpkg: error processing package snapd (--configure):
dependency problems - leaving unconfigured
Errors were encountered while processing:
snapd
Even if I want to delete or install some unrelated package. Everything what I could find I have tried and nothing made a change.
List of errors grows depending what I want to do. But these to are always there.
Even with my 20 years of desktop experience and light linux/bsd admin, I cannot fix this mess.
