After doing the above, I did the following: dan@Latitude-E6410:~$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 15.04 Release: 15.04 Codename: vivid dan@Latitude-E6410:~$ sudo /usr/bin/update-manager [sudo] password for dan:
and I received a bunch of errors including the following: Error loading .desktop file /usr/share/applications/kde4/knetattach.desktop: constructor returned NULL Error loading .desktop file /usr/share/app-install/desktop/kde-runtime:kde4__knetattach.desktop: constructor returned NULL Error loading .desktop file /usr/share/applications/lubuntu-screenlock.desktop: constructor returned NULL Error loading .desktop file /usr/share/applications/lubuntu-logout.desktop: constructor returned NULL Error loading .desktop file /usr/share/applications/scid.desktop: constructor returned NULL Error loading .desktop file /usr/share/app-install/desktop/scid:scid.desktop: constructor returned NULL ERROR:root:Bad upgrade: 'vivid' != 'trusty' dan@Latitude-E6410:~$ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1424426 Title: not possible to calculate upgrade from T to U with lubuntu-core as the metapkg To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1424426/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs