I encountered this bug on trying to upgrade from Precise to Trusty and was able to move on from this error by deselecting all those PPAs (by means of the graphical interface) which referred to 'precise' as the distribution.
I then ran 'sudo do-release-upgrade' and the upgrade proceeded as usual. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1357005 Title: release upgrade fails on some aptcdrom atribute error To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/1357005/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
