Would it be possible for you to test the latest upstream stable kernel?
Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the
latest v4.4 stable kernel[0].

If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag:

If you are unable to test the mainline kernel, for example it will not boot, 
please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as 

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.115

** Changed in: linux (Ubuntu)
   Importance: Undecided => High

** Changed in: linux (Ubuntu)
       Status: Confirmed => Incomplete

** Tags added: kernel-da-key

You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.

  Boot failed with hard LOCKUP linux-image-4.4.0-112

Status in linux package in Ubuntu:

Bug description:
  Booting this kernel ended with

  [35.111831] NMI watchdog: Watchdog detected hard LOCKUP on cpu 1
  [36.073026] NMI watchdog: Watchdog detected hard LOCKUP on cpu 2
  [36.153549] NMI watchdog: Watchdog detected hard LOCKUP on cpu 0
  [36.451526] NMI watchdog: Watchdog detected hard LOCKUP on cpu 3 

  Booting previous kernel linux-image-4.4.0-109-generic is working
  smoothly as well as previous ones.

  cat /proc/version_signature = Ubuntu 4.4.0-109.132-generic 4.4.98

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-112-generic 4.4.0-112.135
  ProcVersionSignature: Ubuntu 4.4.0-109.132-generic 4.4.98
  Uname: Linux 4.4.0-109-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.15
  Architecture: amd64
   /dev/snd/controlC0:  dh         2583 F.... pulseaudio
   /dev/snd/controlC1:  dh         2583 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Fri Feb  9 19:02:26 2018
   # This is a distribution channel descriptor
   # For more information see 
  HibernationDevice: RESUME=UUID=103ed14e-e6b6-49d5-a28f-020343e6a118
  InstallationDate: Installed on 2013-10-13 (1580 days ago)
  InstallationMedia: Ubuntu 12.04 "Precise" - Build amd64 LIVE Binary 
  MachineType: Dell Inc. Latitude E7440
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-109-generic 
root=UUID=8a01ac20-42e5-49f3-b385-674e05cd8d7c ro quiet splash 
   linux-restricted-modules-4.4.0-109-generic N/A
   linux-backports-modules-4.4.0-109-generic  N/A
   linux-firmware                             1.157.15
  SourcePackage: linux
  UpgradeStatus: Upgraded to xenial on 2016-10-05 (491 days ago)
  dmi.bios.date: 12/15/2017
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A23
  dmi.board.name: 0JNYGR
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.product.name: Latitude E7440
  dmi.product.version: 00
  dmi.sys.vendor: Dell Inc.

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