[Bug 1885085] Re: Suspend is not deep

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: grub2 (Ubuntu)
       Status: New => Confirmed

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Title:
  Suspend is not deep

Status in grub2 package in Ubuntu:
  Confirmed

Bug description:
  After a fresh Ubuntu 20.04 installation, the suspend is not "deep" but it is "idle".
  Deep is very important, otherwise the laptop/notebook might over heat (!) if you put it into a sleeve or bag while suspended. Which happened to my notebook.

  How to reproduce:

  1) install Ubuntu 20.04 on a notebook/laptop
  2) suspend via lid close or suspend button or gnome shell system menu
  3) wake up from suspend and type
  sudo journalctl | grep "PM: suspend" | tail -2
  4) find the message "PM: suspend entry (s2idle)"

  How to fix the issue:

  1) sudo nano /etc/default/grub
  2) Replace the line
  GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
  with
  GRUB_CMDLINE_LINUX_DEFAULT="quiet splash mem_sleep_default=deep"
  3) recreate grub with
  sudo grub-mkconfig -o /boot/grub/grub.cfg
  4) reboot
  5) suspend via lid close or suspend button or gnome shell system menu
  6) wake up from suspend and run
  sudo journalctl | grep "PM: suspend" | tail -2
  7) find the message "PM: suspend entry (deep)"

  This fixes your suspend and makes your laptop go into deep sleep,
  which greatly increases suspended battery uptime and greatly decreases
  the heat the notebook creates.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: grub2 (not installed)
  ProcVersionSignature: Ubuntu 5.4.0-37.41-generic 5.4.41
  Uname: Linux 5.4.0-37-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.3
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Jun 25 09:14:57 2020
  InstallationDate: Installed on 2020-06-23 (1 days ago)
  InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  SourcePackage: grub2
  UpgradeStatus: No upgrade log present (probably fresh install)

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