Public bug reported:
Upgrade from 18.04 to 20.04 fails. I have tried both the graphical
option and command line option.
Checking package manager
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating the changes
Calculating the changes
Could not calculate the upgrade
An unresolvable problem occurred while calculating the upgrade.
Description: Ubuntu 18.04.5 LTS
Release: 18.04
argj@argj-hpz8g4:/etc/apt/sources.list.d$ apt-cache policy pkgname
N: Unable to locate package pkgname
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1939722
Title:
Upgrade from 18.04 to 20.04 aborts
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