upgrade to 18.04.5 LTS to 20.04 LTS

[la mia birra]

When updating the ubuntu-release-upgrader
Ubuntu italian:

Impossibile calcolare l'avanzamento

Si è verificato un problema irresolubile durante il calcolo dell'avanzamento.

 Nel caso fosse un altro problema, segnalare un bug eseguendo in un terminale il seguente comando: «ubuntu-bug ubuntu-release-upgrader-core». Per investigare il problema consultare i file di registro in «/var/log/dist-upgrade» che possono contenere maggiori dettagli riguardo all'avanzamento. In particolare, consultare i file «main.log» e «apt.log».

Error in main.log
2020-10-02 16:36:12,131 ERROR Dist-upgrade failed: 'E:Errore, pkgProblemResolver::Resolve ha generato delle interruzioni. Questo potrebbe essere causato da pacchetti bloccati.'

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.38
ProcVersionSignature: Ubuntu 4.15.0-118.119-generic 4.15.18
Uname: Linux 4.15.0-118-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.20.9-0ubuntu7.17
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Fri Oct 2 16:31:47 2020
InstallationDate: Installed on 2018-08-26 (768 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2020-10-02 (0 days ago)
VarLogDistupgradeTermlog:

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Brian Murray (brian-murray)]

Could you please try removing the gnuradio-dev package and trying the upgrade again? Thanks in advance.

[Launchpad Janitor (janitor)]

[Expired for ubuntu-release-upgrader (Ubuntu) because there has been no activity for 60 days.]