Hello Linux Geeksters. As you may know, Kernel 3.12.9 has been recently released, coming with small improvements. For information about the changes brought by the latest kernel patch, see the mailing lists.

In this article I will show you how to install Kernel 3.12.9 on Ubuntu, Linux Mint and Elementary OS.
Because the needed deb packages are available via kernel.ubuntu.com, installing Kernel 3.12.9 on Ubuntu, Linux Mint and Elementary OS is easy. Follow the instructions for your architecture exactly, in order to get a successful installation.
How to install Kernel 3.12.9 on 32 bit Ubuntu, Linux Mint and Elementary OS systems:
Download the needed packages:
$ wget kernel.ubuntu.com/~kernel-ppa/mainline/v3.12.9-trusty/linux-headers-3.12.9-031209_3.12.9-031209.201401251255_all.deb
$ wget kernel.ubuntu.com/~kernel-ppa/mainline/v3.12.9-trusty/linux-headers-3.12.9-031209-generic_3.12.9-031209.201401251255_i386.deb
$ wget kernel.ubuntu.com/~kernel-ppa/mainline/v3.12.9-trusty/linux-image-3.12.9-031209-generic_3.12.9-031209.201401251255_i386.deb
Install Kernel 3.12.9:
$ sudo dpkg -i linux-image-3.12.9*.deb linux-headers-3.12.9*.deb
How to install Kernel 3.12.9 on 64 bit Ubuntu, Linux Mint and Elementary OS systems:
Download the needed packages:
$ wget kernel.ubuntu.com/~kernel-ppa/mainline/v3.12.9-trusty/linux-headers-3.12.9-031209_3.12.9-031209.201401251255_all.deb
$ wget kernel.ubuntu.com/~kernel-ppa/mainline/v3.12.9-trusty/linux-headers-3.12.9-031209-generic_3.12.9-031209.201401251255_amd64.deb
$ wget kernel.ubuntu.com/~kernel-ppa/mainline/v3.12.9-trusty/linux-image-3.12.9-031209-generic_3.12.9-031209.201401251255_amd64.deb
Install Kernel 3.12.9:
$ sudo dpkg -i linux-image-3.12.9*.deb linux-headers-3.12.9*.deb