Kernel Ubuntu x64 3.13.0-83.generic not available
I just upgraded our Ubuntu 12.02 to Ubuntu 14.04.. the kernel that was installed by the upgrade is not available from the Kernel dropdown.
Ubuntu 14.04 x64 vmlinuz-3.13.0-83-generic.
These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.