[Bug 1902393] Re: Unable to upgrade from 18.04 to 20.04

[Ian Kenworthy]

*** This bug is a duplicate of bug 1069133 ***
    https://bugs.launchpad.net/bugs/1069133

It looks different.

When I run sudo ppa-purge ppa:oibaf/graphics-drivers this is what I get


ik at Desktop:~$ sudo ppa-purge ppa:oibaf/graphics-drivers
[sudo] password for ik: 
Updating packages lists
W: Skipping acquire of configured file 'restricted/binary-amd64/Packages' as repository 'http://archive.ubuntu.com/ubuntu bionic InRelease' doesn't have the component 'restricted' (component misspelt in sources.list?)
W: Skipping acquire of configured file 'restricted/binary-i386/Packages' as repository 'http://archive.ubuntu.com/ubuntu bionic InRelease' doesn't have the component 'restricted' (component misspelt in sources.list?)
W: Skipping acquire of configured file 'restricted/i18n/Translation-en_GB' as repository 'http://archive.ubuntu.com/ubuntu bionic InRelease' doesn't have the component 'restricted' (component misspelt in sources.list?)
W: Skipping acquire of configured file 'restricted/i18n/Translation-en' as repository 'http://archive.ubuntu.com/ubuntu bionic InRelease' doesn't have the component 'restricted' (component misspelt in sources.list?)
W: Skipping acquire of configured file 'restricted/dep11/Components-amd64.yml' as repository 'http://archive.ubuntu.com/ubuntu bionic InRelease' doesn't have the component 'restricted' (component misspelt in sources.list?)
W: Skipping acquire of configured file 'restricted/dep11/icons-48x48.tar' as repository 'http://archive.ubuntu.com/ubuntu bionic InRelease' doesn't have the component 'restricted' (component misspelt in sources.list?)
W: Skipping acquire of configured file 'restricted/dep11/icons-64x64.tar' as repository 'http://archive.ubuntu.com/ubuntu bionic InRelease' doesn't have the component 'restricted' (component misspelt in sources.list?)
W: Skipping acquire of configured file 'restricted/cnf/Commands-amd64' as repository 'http://archive.ubuntu.com/ubuntu bionic InRelease' doesn't have the component 'restricted' (component misspelt in sources.list?)
PPA to be removed: oibaf graphics-drivers
Warning:  Could not find package list for PPA: oibaf graphics-drivers

and these files exist in /etc/apt/sources.list.d
/etc/apt/sources.list.d/oibaf-ubuntu-graphics-drivers-bionic.list
/etc/apt/sources.list.d/oibaf-ubuntu-graphics-drivers-bionic.list.distUpgrade
the contents of both are just 2 commented lines

and no items in sources.list ot sources.list.distUpgrade referring to
xorg-oibaf

Any guidance would be appreciated
Thanks

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https://bugs.launchpad.net/bugs/1902393

Title:
  Unable to upgrade from 18.04 to 20.04

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

Bug description:
  Could not determine the upgrade

  An unresolvable problem occurred while calculating the upgrade.

   This was likely caused by:
   * Unofficial software packages not provided by Ubuntu
  Please use the tool 'ppa-purge' from the ppa-purge 
  package to remove software from a Launchpad PPA and 
  try the upgrade again.

  If none of this applies, then please report this bug using the command
  'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. If you want
  to investigate this yourself the log files in '/var/log/dist-upgrade'
  will contain details about the upgrade. Specifically, look at
  'main.log' and 'apt.log'.

  I have removed all ppa: - no difference

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.40
  ProcVersionSignature: Ubuntu 4.15.0-122.124-generic 4.15.18
  Uname: Linux 4.15.0-122-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.18
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Oct 31 23:09:04 2020
  InstallationDate: Installed on 2017-01-22 (1378 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2020-10-31 (0 days ago)
  VarLogDistupgradeTermlog:

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