Hi! you have a broken system, please run in a terminal : sudo apt-get update sudo apt-get install -f
try to upgrade from here: in a terminal: sudo do-release-upgrade if it doesn't work, you have a lot of kernel installed but not the last one for 12.04.5, it will be a good thing to upgrade your system before to be sure your system is OK. in a terminal: sudo apt-get install linux-lts-trusty try to upgrade from here: in a terminal: sudo do-release-upgrade if it doesn't work, then you may have some PPA installed, that may be a source of problems, maybe you will have to remove them, this may be problematic and complicated cause it will be like a puzzle to get back to a normal and stable state. at this point, it may be a good idea to have a technician with you or you will have to learn a lot of how to purge a lot of packages (don't ever remove network-manager and other basic packages). It may be a lot complicated at this point, may be better to reinstall the system from scratch, but don't forget to make a backup of all your system before. hope it may help you. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1372798 Title: unable to upgrade to 14.04 LTS. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/1372798/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
