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[Stilmant Michael <michael.stilmant@xxxxxxxxx>]

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.

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Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1446504

Title:
  Asus X200MA Black Screen after LTS Update (3.13.0-49-generic)

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  related to
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1427646

  Description:    Ubuntu 14.04.2 LTS
  Release:        14.04
  cat /proc/version_signature := Ubuntu 3.13.0-49.83-generic 3.13.11-ckt17
  Linux Lux1-Ops-LiloXX 3.13.0-49-generic #83-Ubuntu SMP Fri Apr 10 20:11:33 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-49-generic 3.13.0-49.83
  ProcVersionSignature: Ubuntu 3.13.0-49.83-generic 3.13.11-ckt17
  Uname: Linux 3.13.0-49-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.10
  Architecture: amd64
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/hwC0D0', '/dev/snd/hwC0D2', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/pcmC0D3p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  Date: Tue Apr 21 09:45:44 2015
  HibernationDevice: RESUME=UUID=8cfe631b-97f1-4da1-b1b2-15675c32779e
  InstallationDate: Installed on 2015-01-19 (91 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 004: ID 05e3:0608 Genesys Logic, Inc. USB-2.0 4-Port HUB
   Bus 001 Device 003: ID 04f2:b483 Chicony Electronics Co., Ltd 
   Bus 001 Device 002: ID 734c:5220 TBS Technologies China 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: ASUSTeK COMPUTER INC. X200MA
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-49-generic.efi.signed root=UUID=44c3a9ad-88df-4e7e-833f-257b8e54822d ro quiet splash vt.handoff=7
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-49-generic N/A
   linux-backports-modules-3.13.0-49-generic  N/A
   linux-firmware                             1.127.11
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/11/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: X200MA.502
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: X200MA
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrX200MA.502:bd09/11/2014:svnASUSTeKCOMPUTERINC.:pnX200MA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnX200MA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.name: X200MA
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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