LTS Enablement Stacks allow Ubuntu 12.04 upgrades to newer kernel versions. By upgrading to newer kernel, ubuntu 12.04 can support more hardware. You can choose newer kernel version up to 12.10 (Quantal), 13.04 (Raring), 13.10 (Saucy).
So how to upgrade your current ubuntu 12.04 kernel to newer kernel ?
Replace “release” word to “quantal” for ubuntu 12.10 kernel, “raring” for ubuntu 13.04, or “saucy” for ubuntu 13.10
sudo apt-get install --install-recommends linux-generic-lts-release xserver-xorg-lts-release libgl1-mesa-glx-lts-release
This method will work on Ubuntu 12.04 and Linux Mint 13.