You're getting the error "The following packages have been kept back: <list of packages>" after you run the sudo apt-get update && apt-get upgrade commands.
Here are three solutions to getting the "kept back" packages upgraded. Open a Terminal Window and try one of the following three solutions
1. This may install the "kept back" packages with little risk.
sudo apt-get --with-new-pkgs upgrade
2. This will install each of the "kept back" packages specifically. Replace <list of packages kept back> with the exact names of the packages listed as "kept back" (this solution usually works for me).
sudo apt-get install <list of packages kept back>
3. If the first two solutions didn't work you can try dist-upgrade. dist-upgrade can be dangerous as it forces the installation of the new dependencies. It may remove packages to resolve complex dependency issues. Use this at your own risk.
apt-get dist-upgrade
That's it. Hope this helps. I've ran into this problem a few times and solution number two usually works for me. Once I used solution three without issue. When using solution two you can copy and paste the list of kept back packages from the Terminal Window.
