Try running '/usr/lib/ubuntu-release-upgrader/check-new-release-gtk' in a terminal and see if any messages are displayed. For future reference release upgrade log files are stored in /var/log/dist-upgrade.
** 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/1510356 Title: Cannot upgrade to Ubuntu 15.10 (Installer Exits) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1510356/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs