As far as I can tell you are told to upgrade to 12.04.5.
From the mailing list:
In an effort to support a wider variety of hardware within the 12.04
Ubuntu LTS release, the 12.04.2 and newer point releases in Precise
shipped with hardware enablement stacks composed of updated kernels
and graphics stacks. The intention has always been for these hardware
enablement stacks to only remain supported until the introduction of
the kernel and graphics stack derived from 14.04. On August 7, 2014,
the 5th and final point release for 12.04 (ie. 12.04.5) will deliver
the kernel and graphics stack derived from 14.04. At that time,
security updates and bug fixes for older hardware enablement stacks
will no longer be provided. All users of older hardware enablement
stacks will be encouraged to update to the 12.04.5 hardware enablement
stack or fully upgrade to 14.04 proper. For any 12.04 HWE stack users
interested in making this migration prior to the August 7, 2014
deadline, we have provided a mechanism to assist with this process.
First, please ensure your system is up to date with the latest package
updates for Precise. Then, run the command below and follow the
instructions which are output:
hwe-support-status --verbose
For further information and details, please see:
https://wiki.ubuntu.com/1204_HWE_EOL
Thanks, Leann Ogasawara
From the website:
What is HWE?
Hardware Enablement Stacks (HWE) are incorporated into installers for
select Ubuntu LTS (Long Term Support) point releases. It is a special
Ubuntu feature that provides an LTS release with hardware support
introduced in newer Ubuntu releases. For Ubuntu 12.04 the point
releases are .2/.3/.4/.5 and the corresponding Ubuntu releases are
12.10/13.04/13.10/14.04.
...
End-of-life (EOL) for 12.04, 12.04.1, and 12.04.5 HWE is April 2017 but for the other HWE stacks it is roughly when 14.04.1 is released: Aug 8, 2014.
How I read this? 12.10, 13.04 and 13.10 are end of life so their HWE are end of life.
12.04 and 12.04.1 use the 12.04 HWE. All other point releases move to the 14.04 HWE.
Seems logical?
lsb_release -a
gives 12.04.4 LTS or 12.04 precise. It has Kerneluname -r 3.8.0-40
. So according to the HWE wiki I am affected by the EOL and so I am told from the update manager. Still it says LTS, does it not?