Thanks for pointing out that apt-listchanges is the culprit for this annoying behaviour. I just read its man page and then changed /etc/apt/listchanges.conf to `frontend=mail` in the [apt] section. I couldn't test it yet, but the man page says that it should not display changes now.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/787802 Title: Update Manager halts waiting for response to apt-listchanges hidden under Details -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs