Saturday, February 10, 2018

kernel - How do I opt in to Early Preview of LTS enablement stack?

As explained in the wiki article LTS Enablement Stacks,



The Ubuntu LTS enablement stacks provide newer kernel and X support for existing LTS releases. These can be installed manually, or are automatically shipped if installing from 12.04.2/14.04.2 and newer release media.



As shown in the chart below, newer hardware enablement stacks become available as 'early preview' (EP) a few months before the next point release.


Ubuntu Kernel Support Schedule


The note in the chart says



Early preview of the HWE kernel being introduced in the point release will be available in the -updates pocket.



What is the '-updates pocket' and how do I opt in to it and to EP of LTS Enablement Stack?


If this operation is reversible, how do I opt back out?


Here's the details of my current situation, but I would really prefer this to be a broader question, applicable at least to all versions of 12.04 and 14.04.


I'm running a 14.04 LTS, installed and updated from 14.04.0 netinstall (Ubuntu 14.04.2, kernel 3.13) and I'm interested in trying out an Ubuntu 15.04 (vivid) and later kernels as they become available in Early Preview; especially an Ubuntu 16.04 kernel - because the support for older updated LTS enablement stacks ends the moment the new one becomes available, I figure it's good to try newer stacks in EP mode.

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