Comment 12 for bug 1446504

I believe I've a partial answer from here

"As a Long Term Support release, Ubuntu 14.04.2 includes an updated hardware enablement stack that includes the 3.16 Linux kernel and an updated version of the Xorg display server. [...] The new hardware enablement stack will be installed by default if you install from 14.04.2 installation media, but if you’re humming along nicely with the current versions of Xorg and the Linux kernel on 14.04 and 14.04.1, fear not – the new stack is not installed by default and is completely opt-in."

from here: http://www.omgubuntu.co.uk/2015/02/ubuntu-14-04-2-lts-released-includes-3-16-kernel
details of the stuf: http://askubuntu.com/questions/506956/how-can-i-install-3-16-kernel-on-ubuntu-14-04

So I believe to understand that if we want to correct the proper way LTS 14.04.2 release installed prior a fresh 14.04.2 installation media, future 3.13.x release update of LTS 14.04.2 needs to include the correction to avoid to force people to install HWE.
What you are trying to track Christopher. Right?

So my situation is to not update kernel over 3.13.0-44 for X200 laptops where LST 14.04.X is already installed.
for those laptop I would need to wait, eventually, LTS 14.04.3 around august.
on new X200 laptops laptops the LTS 14.04.2 include 3.16 by default. (what strange is that some how, update of linux-generic-lts-utopic was already held back)
And for laptop updated to 3.13.0-45, or i need to install HWE from linux-generic-lts-utopic and co, or I need to wait for 3.13.0-x providing some roll-back or some code correction.

So I understand, that next steps are really to do your advice from https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1416849/comments/17

But I guess 3.16 is needed and not 3.19. right?

Thanks.