So - I tried it now with my production pc. Same result.
Started with the upgrade of my trusty 12.04.5 LTS Upgrade: - was disabling old repos = ok - Enabling new repos ... and then = error message (I have to translate from german to english sorry) "It could not be determined which uprades are available. " "An unresolvable problem occured while calculating the upgrade. This can be caused by: *Upgrading to a pre-release version of Ubuntu *Running the current pre-release version of Ubuntu *Unofficial software packages not provided by Ubuntu. .... " The problem is: I do not know if I have "unofficial software packages" installed. And why did it happen on my other machine too? I do not assume that I have installed "unofficial" software on 2 machines. It might happen once to try sth. Is there a chance I can find out which package this could be??? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1355418 Title: upgrading to Kubuntu 14.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1355418/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
