Public bug reported:

The system hangs when I ask it to print, and I can't get it to panic and
dump.  Keyboard sysrq doesn't seem to do anything, nor does waiting 15
minutes.  Using the text console makes no difference either.  Memtest
shows no errors.  When I boot 4.4.0-112 kernel there's no problem.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-116-generic 4.4.0-116.140
ProcVersionSignature: Ubuntu 4.4.0-116.140-generic 4.4.98
Uname: Linux 4.4.0-116-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  dbw        1945 F.... pulseaudio
 /dev/snd/controlC1:  dbw        1945 F.... pulseaudio
CurrentDesktop: MATE
Date: Sun Apr  1 19:16:11 2018
HibernationDevice: RESUME=UUID=94c6940e-4c23-4002-960a-45e56867ea6d
InstallationDate: Installed on 2016-05-06 (695 days ago)
InstallationMedia: Ubuntu-MATE 16.04 LTS "Xenial Xerus" - Release amd64 
(20160420.1)
IwConfig:
 lo        no wireless extensions.
 
 eno1      no wireless extensions.
MachineType: ASUS All Series
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-116-generic 
root=UUID=d0cf2d81-4dbf-4a5a-b898-285e3c3fdd8b ro quiet splash 
crashkernel=384M-2G:128M,2G-:256M vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-116-generic N/A
 linux-backports-modules-4.4.0-116-generic  N/A
 linux-firmware                             1.157.17
RfKill:
 
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/11/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1304
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: Z97-A
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr1304:bd07/11/2014:svnASUS:pnAllSeries:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnZ97-A:rvrRev1.xx:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: All Series
dmi.product.version: System Version
dmi.sys.vendor: ASUS

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Confirmed


** Tags: amd64 apport-bug xenial

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https://bugs.launchpad.net/bugs/1760508

Title:
  system hang

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  The system hangs when I ask it to print, and I can't get it to panic
  and dump.  Keyboard sysrq doesn't seem to do anything, nor does
  waiting 15 minutes.  Using the text console makes no difference
  either.  Memtest shows no errors.  When I boot 4.4.0-112 kernel
  there's no problem.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-116-generic 4.4.0-116.140
  ProcVersionSignature: Ubuntu 4.4.0-116.140-generic 4.4.98
  Uname: Linux 4.4.0-116-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.15
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  dbw        1945 F.... pulseaudio
   /dev/snd/controlC1:  dbw        1945 F.... pulseaudio
  CurrentDesktop: MATE
  Date: Sun Apr  1 19:16:11 2018
  HibernationDevice: RESUME=UUID=94c6940e-4c23-4002-960a-45e56867ea6d
  InstallationDate: Installed on 2016-05-06 (695 days ago)
  InstallationMedia: Ubuntu-MATE 16.04 LTS "Xenial Xerus" - Release amd64 
(20160420.1)
  IwConfig:
   lo        no wireless extensions.
   
   eno1      no wireless extensions.
  MachineType: ASUS All Series
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-116-generic 
root=UUID=d0cf2d81-4dbf-4a5a-b898-285e3c3fdd8b ro quiet splash 
crashkernel=384M-2G:128M,2G-:256M vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-116-generic N/A
   linux-backports-modules-4.4.0-116-generic  N/A
   linux-firmware                             1.157.17
  RfKill:
   
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/11/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1304
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: Z97-A
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: Rev 1.xx
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr1304:bd07/11/2014:svnASUS:pnAllSeries:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnZ97-A:rvrRev1.xx:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: All Series
  dmi.product.version: System Version
  dmi.sys.vendor: ASUS

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