Public bug reported: Updating from Trusty 14.04.
Steps to reproduce: sudo apt-get install update-manager-core python-apt sudo sed -i -e 's/Prompt=lts/Prompt=normal/' /etc/update-manager/release-upgrades sudo do-release-upgrade -d -f DistUpgradeViewNonInteractive After while, it shows text that looks like: b'\r'b'E'b'x'b't'b'r'b'a'b'c'b't'b'i'b'n'b'g'b'. You can extract some meaning out of it using sed to remove the 'b': sed -e "s/'b'//g" upgrade.log | sed -e 's/\\r\\n/|/g' | tr '|' '\n' And I can see that the upgrade is actually interactive: --- Configuration file 'b"'"b'/etc/upstart-xsessions'b"'"b' ==> Modified (by you or by a script) since installation. ==> Package distributor has shipped an updated version. What would you like to do about it ? Your options are: Y or I : install the package maintainer'b"'"b's version N or O : keep your currently-installed version D : show the differences between the versions Z : start a shell to examine the situation The default action is to keep your current version. *** upstart-xsessions (Y/I/N/O/D/Z) [default=N] ? ' --- This used to work fine (precise->trusty, saucy->trusty). Is there a new frontend that replaces DistUpgradeViewNonInteractive? ** Affects: update-manager-core (Ubuntu) Importance: Undecided Status: New ** Attachment added: "upgrade.log (output of command)" https://bugs.launchpad.net/bugs/1382707/+attachment/4239281/+files/upgrade.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1382707 Title: trusty->utopic non-interactive upgrade outputs garbage, and is interactive To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-manager-core/+bug/1382707/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs