I have disabled ALL the PPAs to be sure and the result is: An unresolvable problem occurred while calculating the upgrade.
This was caused by: * Upgrading to a pre-release version of Ubuntu This is most likely a transient problem, please try again later. 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'. ** Attachment added: "main.log" https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/2079924/+attachment/5814798/+files/main.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2079924 Title: Could not determine the upgrade An unresolvable problem occurred while calculating the upgrade To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/2079924/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
