See https://bugs.launchpad.net/ubuntu/+source/ubuntu-release- upgrader/+bug/1486162. The bug is in the message that doesnot give any hints on how to resolve this. E.g. looking in /var/log/dist-upgrade log files or using ppa-purge see http://askubuntu.com/questions/307/how-can- ppas-be-removed
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1608198 Title: upgrade 14.04 LTS to 16.04.1 LTS impossible To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1608198/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
