GNU/Linux Ubuntu Updating Kernel GUI Guide
You Are Welcome! The Tutorial Shows You Step-by-Step How-to Update/Upgrade Linux Kernel with GUI easily in Ubuntu GNU/Linux Desktops.
And this Update Linux Kernel Ubuntu Guide make use of Mainline a UI Tool for installing the latest mainline Linux Kernel on Ubuntu based Distributions.
Especially relevant: this guide is valid also in case you need to Downgrade the Linux Kernel.
Finally, this guide includes detailed instructions about to Updating Linux Firmware on Ubuntu.