Can you please open a terminal and execute the following commands and report any errors:
sudo apt-get update ** Changed in: update-manager (Ubuntu) Status: New => Incomplete -- Update Manager will not run https://bugs.launchpad.net/bugs/380437 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs