** Also affects: hwe-next
   Importance: Undecided
       Status: New

** Changed in: hwe-next
     Assignee: (unassigned) => AceLan Kao (acelankao)

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https://bugs.launchpad.net/bugs/1693393

Title:
  Power consumption issue on suspend-to-idle(s2idle)

Status in HWE Next:
  New
Status in linux package in Ubuntu:
  In Progress

Bug description:
  The power consumption is pretty high(8Watt) during suspend-to-idle
  mode under Xenial.

  1. It consumes 8Watt under 4.4 kernel
  2. It consumes 4Watt under 4.8 kernel
  3. It consumes 2Watt under 4.11 kernel

  There are essential patches in 4.8 and 4.11 kernels, they are
  In 4.8
     9d26d3a PCI: Put PCIe ports into D3 during suspend
  In 4.11
     8d2c453 platform/x86: dell-laptop: Add Latitude 7480 and others to the DMI 
whitelist

  We need these 2 commits to have better s2idle support.

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