Please try installing one of the missing meta packages listed in the error message below:
2015-11-27 11:20:17,633 DEBUG none of the '['ubuntu-desktop', 'kubuntu-desktop', 'xubuntu-core', 'xubuntu-desktop', 'ubuntustudio-desktop', 'mythbuntu-desktop', 'kubuntu-netbook', 'lubuntu-core', 'lubuntu-desktop', 'ubuntu-gnome-desktop', 'ubuntu-mate-core', 'ubuntu-mate-cloudtop', 'ubuntu-mate-desktop']' meta-pkgs installed 2015-11-27 11:20:17,633 DEBUG guessing 'ubuntu-desktop' as missing meta-pkg 2015-11-27 11:20:18,063 ERROR failed to mark 'ubuntu-desktop' for install (E:Unable to correct problems, you have held broken packages.) ** Changed in: ubuntu-release-upgrader (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1520418 Title: dist-upgrade15.10 -> 16.04, To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1520418/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs