It is completely normal that X will exit on distribution upgrades. You should never Upgrade a Linux system while running X! The normal way is to update the sources, apt-get update, apt-get upgrade and reboot, followed by apt-get dist-upgrade.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1555237 Title: Upgrade from 14.04.4→ 16.04 dies midway taking out the session. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1555237/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
