** Changed in: linux-oem (Ubuntu)
       Status: Triaged => Fix Committed

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https://bugs.launchpad.net/bugs/1781533

Title:
  SATA device is not going to DEVSLP

Status in HWE Next:
  Triaged
Status in OEM Priority Project:
  Triaged
Status in linux-oem package in Ubuntu:
  Fix Committed

Bug description:
  [Impact]
  Any of the platforms we’ve been seeing SATA problems not going to deepest 
state leads to other devices not getting there during long idle or s2idle. And 
it also prevents the system from entering deeper PC state other than PC3.

  [Fix]
  Suggested from Intel and Dell to contains the following 4 commits,
  and all of 4 commits are in v4.19-rc1
  https://patchwork.kernel.org/patch/10502285/
  https://patchwork.kernel.org/patch/10502287/
  https://patchwork.kernel.org/patch/10535781/
  https://patchwork.kernel.org/patch/10535783/

  [Test]
  Verified the power consumption on some new platforms, it improves the SATA 
HDD power consumption around 0.5w during long idle.

  [Regression Potential]
  Low, the DEVSLP function is already validated when shipped with SLP_S0
  support.

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