What is hwe kernel

What is the HWE Kernel?

The HWE (Hardware Enablement) kernel is an optional kernel package provided by Canonical for Ubuntu Long Term Support (LTS) releases. It enables these systems to use newer kernel versions and hardware drivers than the kernel version that was originally included with the LTS release. This approach balances the stability of LTS releases with support for newer hardware components.

Why HWE Kernels Exist

When Ubuntu releases an LTS version, the included Linux kernel represents the current state of hardware support at that time. However, hardware technology advances rapidly. New processors, graphics cards, storage controllers, and other components are released constantly. By the time an LTS release is 2-3 years old, newer hardware may not be properly supported by the original kernel. HWE kernels solve this by providing access to newer kernel versions that include drivers and support for these new components.

How HWE Kernels Work

The HWE kernel is packaged as a standard Ubuntu package update available through the standard package repositories. Users can install it using package management tools like apt-get. Once installed, the HWE kernel provides a newer version of the Linux kernel while maintaining compatibility with the LTS release. Security updates and critical patches are provided throughout the LTS support period, ensuring that systems remain secure while using newer hardware drivers.

HWE vs Standard Kernel

Standard LTS kernels receive 5 years of support from the release date, with updates focused on security and critical fixes. HWE kernels follow a different update cycle, typically receiving rolling kernel updates that follow the hardware enablement schedule. This means HWE users get access to a sequence of newer kernels during the LTS period, while standard kernel users stay on the original kernel version with backported patches.

Installation and Compatibility

Installing the HWE kernel is optional and straightforward. Users can enable it on any Ubuntu LTS installation using the package manager. However, enabling HWE means accepting newer kernel versions and potentially different driver behaviors. Most modern systems will have improved hardware support with HWE, but some edge cases or specialized hardware may require testing before enabling it on production systems.