[Bug 1930765] [NEW] Unable to upgrade from 18.04 to 20.04

[merelle]

Public bug reported:

1) OS info:
Description:    KDE neon Testing Edition
Release:        18.04

2) Package version:
ubuntu-release-upgrader-core: 1:18.04.38+p18.04+git20200803.1136

3) I'm trying to upgrade from 18.04LTS to 20.04LTS

4) I'm unable to upgrade due this bug:
> No snaps are installed yet. Try 'snap install hello-world'.
> exitMainLoopMidFlight
> nvidia-driver-460

This bug started months ago, ubuntu-drivers-common was unable to recognize "nvidia-xxx-server" as drivers name due to a regex that has been fixed in new release as reported in changelog: 
https://packages.ubuntu.com/bionic-updates/ubuntu-drivers-common
The fix was available from august on focal's ubuntu-drivers-common package as discussed here:
https://github.com/tseliot/ubuntu-drivers-common/issues/46

But now I'm still unable to upgrade, maybe it is related to these bugs:
https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1891392
https://bugs.launchpad.net/ubuntu/+source/ubuntu-drivers-common/+bug/1891183

ProblemType: Bug
DistroRelease: KDE neon 18.04
Package: ubuntu-release-upgrader-core 1:18.04.38+p18.04+git20200803.1136 [origin: unknown]
ProcVersionSignature: Ubuntu 4.15.0-144.148-generic 4.15.18
Uname: Linux 4.15.0-144-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.24
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: KDE
Date: Thu Jun  3 22:35:23 2021
InstallationDate: Installed on 2016-10-02 (1705 days ago)
InstallationMedia: Ubuntu-GNOME 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160720)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2021-06-03 (0 days ago)
VarLogDistupgradeTermlog:

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic dist-upgrade third-party-packages

** Attachment added: "Logs file"
   https://bugs.launchpad.net/bugs/1930765/+attachment/5502245/+files/log_ubuntu_release_upgrade.zip

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https://bugs.launchpad.net/bugs/1930765

Title:
  Unable to upgrade from 18.04 to 20.04

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  1) OS info:
  Description:    KDE neon Testing Edition
  Release:        18.04

  2) Package version:
  ubuntu-release-upgrader-core: 1:18.04.38+p18.04+git20200803.1136

  3) I'm trying to upgrade from 18.04LTS to 20.04LTS

  4) I'm unable to upgrade due this bug:
  > No snaps are installed yet. Try 'snap install hello-world'.
  > exitMainLoopMidFlight
  > nvidia-driver-460

  This bug started months ago, ubuntu-drivers-common was unable to recognize "nvidia-xxx-server" as drivers name due to a regex that has been fixed in new release as reported in changelog: 
  https://packages.ubuntu.com/bionic-updates/ubuntu-drivers-common
  The fix was available from august on focal's ubuntu-drivers-common package as discussed here:
  https://github.com/tseliot/ubuntu-drivers-common/issues/46

  But now I'm still unable to upgrade, maybe it is related to these bugs:
  https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1891392
  https://bugs.launchpad.net/ubuntu/+source/ubuntu-drivers-common/+bug/1891183

  ProblemType: Bug
  DistroRelease: KDE neon 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.38+p18.04+git20200803.1136 [origin: unknown]
  ProcVersionSignature: Ubuntu 4.15.0-144.148-generic 4.15.18
  Uname: Linux 4.15.0-144-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.24
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: KDE
  Date: Thu Jun  3 22:35:23 2021
  InstallationDate: Installed on 2016-10-02 (1705 days ago)
  InstallationMedia: Ubuntu-GNOME 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160720)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2021-06-03 (0 days ago)
  VarLogDistupgradeTermlog:

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