Kernel Upgrade

When you are ready to upgrade your kernel, you can emerge the latest version of the kernel sources using portage.

$ sudo emerge -av gentoo-sources

Use the eselect tool to switch to the new kernel. To view available options

$ sudo eselect kernel list

To set to a specific kernel

$ sudo eselect kernel set number

Follow the guide to Configure the Kernel. After you have copied your new kernel to your boot partition, you'll also need to re-emerge a few packages so that your input and video drivers are properly configured for the new kernel.

$ sudo emerge -av $(qlist -IC x11-drivers)

If you use virtualbox, you'll also need to re-emerge those modules

$ sudo emerge -av virtualbox-modules

Reboot your system into your new kernel. Once you have tested your system thoroughly and are satisfied with its stability, you can remove previous kernel versions.

$ sudo emerge -avP gentoo-sources