Since this is a boot issue, I've set the package to "linux", following the instructions at https://wiki.ubuntu.com/Bugs/FindRightPackage#When_installing_Ubuntu_.28or_Derivatives.29
Since this is a boot issue, I've set the package to "linux", following the instructions at https:/ /wiki.ubuntu. com/Bugs/ FindRightPackag e#When_ installing_ Ubuntu_ .28or_Derivativ es.29