Summary of my tests
WORKS:
* Ubuntu 16.04.6 LTS (xenial), clean install and after updates as well
* Ubuntu 16.10 (Yakkety Yak), clean install and after updates as well

FAILS: (no DPMS)
* Ubuntu 16.04.6 LTS (xenial), with HWE kernel
* Ubuntu 17.04 (Zesty Zapus)

I tried some APT pinning to test kernel combinations:
WORKS:
* Ubuntu 17.04 (Zesty Zapus), with kernel from 16.10 using apt pinning.
FAILS:
* Ubuntu 16.10 (Yakkety Yak), with kernel from 17.04 using apt pinning.

So I'm convinced it's something in the kernel package. Could be the
options the kernels are compiled with, or something upstream?

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https://bugs.launchpad.net/bugs/1767568

Title:
  Console DPMS Nonfunctional in Ubuntu Server 18.04

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  My console display is DPMS capable, i.e., power management functions
  worked before upgrading from Ubuntu Server 16.0.4.4.  Currently the
  display stays on 24x7 with idle keyboard input.

  1) My release information is as follows:

  Description:    Ubuntu 18.04 LTS
  Release:        18.04

  2) I am not sure what package this issue is tied to.  The current
  kernel appears to have DPMS support enabled, per the configuration
  file in /boot.  If the kernel is responsible, below is the version I
  am running.

  linux-generic:
  Installed: 4.15.0.20.23

  3) I expected to have DPMS support for my console as in the previous
  release of Ubuntu Server.

  4) What happened instead is my monitor stays on all the time, without DPMS 
controlling it.
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 
k4.15.0-20-generic.
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
  ApportVersion: 2.20.9-0ubuntu7
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 
'arecord'
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/hwC1D3', 
'/dev/snd/hwC1D2', '/dev/snd/hwC1D1', '/dev/snd/hwC1D0', '/dev/snd/pcmC1D9p', 
'/dev/snd/pcmC1D8p', '/dev/snd/pcmC1D7p', '/dev/snd/pcmC1D3p', 
'/dev/snd/controlC1', '/dev/snd/by-path', '/dev/snd/hwC0D2', 
'/dev/snd/pcmC0D2c', '/dev/snd/pcmC0D1c', '/dev/snd/pcmC0D1p', 
'/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/seq', 
'/dev/snd/timer'] failed with exit code 1:
  Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer': 
'amixer'
  Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer': 
'amixer'
  Card1.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer': 
'amixer'
  Card1.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer': 
'amixer'
  DistroRelease: Ubuntu 18.04
  HibernationDevice: RESUME=UUID=ab9de6b4-cca0-4e5c-89d7-e706214c8f11
  InstallationDate: Installed on 2014-07-23 (1378 days ago)
  InstallationMedia: Ubuntu-Server 14.04 LTS "Trusty Tahr" - Release amd64 
(20140416.2)
  MachineType: Gigabyte Technology Co., Ltd. X58A-UD5
  Package: linux (not installed)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 nouveaufb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic 
root=UUID=5631d3aa-8dce-4306-a08d-4ab3753256ab ro
  ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
  RelatedPackageVersions:
   linux-restricted-modules-4.15.0-20-generic N/A
   linux-backports-modules-4.15.0-20-generic  N/A
   linux-firmware                             1.173
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
  Tags:  bionic apport-hook-error
  Uname: Linux 4.15.0-20-generic x86_64
  UnreportableReason: This report is about a package that is not installed.
  UpgradeStatus: Upgraded to bionic on 2018-04-26 (4 days ago)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: False
  dmi.bios.date: 03/11/2010
  dmi.bios.vendor: Award Software International, Inc.
  dmi.bios.version: F5
  dmi.board.name: X58A-UD5
  dmi.board.vendor: Gigabyte Technology Co., Ltd.
  dmi.board.version: x.x
  dmi.chassis.type: 3
  dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
  dmi.modalias: 
dmi:bvnAwardSoftwareInternational,Inc.:bvrF5:bd03/11/2010:svnGigabyteTechnologyCo.,Ltd.:pnX58A-UD5:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnX58A-UD5:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
  dmi.product.name: X58A-UD5
  dmi.sys.vendor: Gigabyte Technology Co., Ltd.

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