I'd like to perform a bisect to identify the commit that introduced this
regression. Can you test the following kernels and see which ones
exhibit the bug:

4.4.19: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.19/
4.4.20: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.20/
4.4.21: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.21

You don't have to test all of them, just up until the first one shows
the bug.

Thanks in advance!

** Also affects: linux (Ubuntu Xenial)
   Importance: Undecided
       Status: New

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

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

** 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.

  kernel panic when booting 4.4.0-42 and 4.4.0-38, but not 4.4.0-36

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  In Progress

Bug description:
  This occurred after rebooting after running Kubuntu's Update Manager
  5.6.2 on 2016-10-12. Unfortunately, I hadn't rebooted after the last
  update that required me to do so, and thus I don't know if the problem
  was from that update or this one.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-36-generic 4.4.0-36.55
  ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16
  Uname: Linux 4.4.0-36-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
   /dev/snd/controlC1:  jacob      1494 F.... pulseaudio
   /dev/snd/controlC0:  jacob      1494 F.... pulseaudio
  CurrentDesktop: KDE
  Date: Wed Oct 12 19:54:03 2016
  HibernationDevice: RESUME=UUID=c5fdca37-edfe-4f31-928b-970bd6696164
  InstallationDate: Installed on 2016-05-25 (140 days ago)
  InstallationMedia: Kubuntu 16.04 LTS "Xenial Xerus" - Release amd64 
  MachineType: Gigabyte Technology Co., Ltd. To be filled by O.E.M.
  ProcFB: 0 nouveaufb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-36-generic 
root=UUID=c70ba36b-21e9-48ae-bf12-79060d17dcfc ro quiet splash
   linux-restricted-modules-4.4.0-36-generic N/A
   linux-backports-modules-4.4.0-36-generic  N/A
   linux-firmware                            1.157.4
   0: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/02/2012
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: F3
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: Z77-DS3H
  dmi.board.vendor: Gigabyte Technology Co., Ltd.
  dmi.board.version: x.x
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.product.name: To be filled by O.E.M.
  dmi.product.version: To be filled by O.E.M.
  dmi.sys.vendor: Gigabyte Technology Co., Ltd.

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