Hi Tom-lorinthe... I'm not so sure what is your suggestion. I should add 
"acpi_rev_override=1" after GRUB_CMDLINE_LINUX_DEFAULT="splash 
acpi_rev_override=1 nouveau.runpm=0"??
In my case, when I run that command that line is commented as 
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash". I am running Ubuntu 18.04, fresh 
install from April 26th on a Lenovo e11.
Everything works fine but the suspend feature; not with all windows closed, not 
at all, period.
Some guidance would be grateful.
Cheers.

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to gnome-screensaver in Ubuntu.
https://bugs.launchpad.net/bugs/1768176

Title:
  Unable to suspend computer

Status in gnome-screensaver package in Ubuntu:
  Confirmed

Bug description:
  Ubuntu 18.04 fails to suspend if a window is open - it merely goes to
  the lock screen with a message that 1 process could not be stopped.
  [Side note - this behaviour disregards that I have the lock  screen
  disabled in Privacy settings.]

  I closed Chrome and a terminal window to reveal the second behaviour:
  When suspend is selected (through power icon) the computer power
  momentarily stops (under a second) then the computer returns to the
  lock screen after a pause.

  Suspend worked very consistently on this hardware on 16.04 LTS in all
  situations. No changes have been made to the hardware since (long
  before) upgrade to 18.04.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: gnome-screensaver 3.6.1-8ubuntu3
  ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
  Uname: Linux 4.15.0-20-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.9-0ubuntu7
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Mon Apr 30 22:55:45 2018
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_CA.UTF-8
   SHELL=/bin/bash
  SourcePackage: gnome-screensaver
  Symptom: security
  Title: Screen locking issue
  UpgradeStatus: No upgrade log present (probably fresh install)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/gnome-screensaver/+bug/1768176/+subscriptions

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