Today with 4.18.0-16-generic and s2idle activated, the consumption is
lesser than in the past.

100 % at 0h00 : I leave my laptop without suspend it. KDE suspend my laptop 
after 15 min.
95% at 7h40

I've powertop enabled.

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  Dell XPS 13 (9370) defaults to s2idle sleep/suspend instead of deep

Status in linux package in Ubuntu:

Bug description:
  It seems that the Dell 9370 is set to go into s2idle mode rather than
  deep sleep, forgoing significant power savings.

  I have confirmed this by suspending and then checking:
  sudo journalctl | grep "PM: suspend" | tail -2. If the output is

  PM: suspend entry (s2idle)
  PM: suspend exit

  cat /sys/power/mem_sleep showed

  [s2idle] deep

  As a temporary fix, I typed 
  echo deep > /sys/power/mem_sleep 
  as a root user (sudo -i). 

  Then the output of cat /sys/power/mem_sleep was
  s2idle [deep]

  After suspending now, 
  sudo journalctl | grep "PM: suspend" | tail -2 returns

  PM: suspend entry (deep)
  PM: suspend exit

  I have made this permanent by editing 

  and replacing
  GRUB_CMDLINE_LINUX_DEFAULT="quiet splash mem_sleep_default=deep"

  then regenerating my grub configuration (sudo grub-mkconfig -o

  This appears to be working with no ill effects.

  Credit to

  ProblemType: Bug
  DistroRelease: Ubuntu 18.10
  Package: linux-image-4.18.0-11-generic 4.18.0-11.12
  ProcVersionSignature: Ubuntu 4.18.0-11.12-generic 4.18.12
  Uname: Linux 4.18.0-11-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.10-0ubuntu13.1
  Architecture: amd64
   /dev/snd/controlC0:  aaron-work   3672 F.... pulseaudio
   /dev/snd/pcmC0D0p:   aaron-work   3672 F...m pulseaudio
  Date: Tue Dec 18 09:52:44 2018
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=/dev/ubuntu-vg/swap_1
  InstallationDate: Installed on 2018-09-04 (104 days ago)
  InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 0489:e0a2 Foxconn / Hon Hai 
   Bus 001 Device 002: ID 0bda:58f4 Realtek Semiconductor Corp. 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Dell Inc. XPS 13 9370
   PATH=(custom, no user)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.18.0-11-generic 
root=/dev/mapper/ubuntu--vg-root ro quiet splash mem_sleep_default=deep 
   Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not 
accessible: Permission denied
   No PulseAudio daemon running, or not running as session daemon.
   linux-restricted-modules-4.18.0-11-generic N/A
   linux-backports-modules-4.18.0-11-generic  N/A
   linux-firmware                             1.175.1
  SourcePackage: linux
  UpgradeStatus: Upgraded to cosmic on 2018-10-26 (52 days ago) 08/09/2018
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.5.1 0F6P3V
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 10
  dmi.chassis.vendor: Dell Inc.
dmi:bvnDellInc.:bvr1.5.1:bd08/09/2018:svnDellInc.:pnXPS139370:pvr:rvnDellInc.:rn0F6P3V:rvrA00:cvnDellInc.:ct10:cvr: XPS XPS 13 9370
  dmi.product.sku: 07E6
  dmi.sys.vendor: Dell Inc.

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