** Also affects: linux (Ubuntu Bionic)
   Importance: Undecided
       Status: New

** Also affects: linux-oem (Ubuntu Bionic)
   Importance: Undecided
       Status: New

** Also affects: linux (Ubuntu Cosmic)
   Importance: Undecided
       Status: New

** Also affects: linux-oem (Ubuntu Cosmic)
   Importance: Undecided
       Status: New

** Also affects: linux (Ubuntu Disco)
   Importance: Undecided
     Assignee: AceLan Kao (acelankao)
       Status: In Progress

** Also affects: linux-oem (Ubuntu Disco)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu Cosmic)
       Status: New => In Progress

** Changed in: linux (Ubuntu Bionic)
       Status: New => In Progress

** Changed in: linux-oem (Ubuntu Cosmic)
       Status: New => Invalid

** Changed in: linux-oem (Ubuntu Disco)
       Status: New => Opinion

** Changed in: linux-oem (Ubuntu Disco)
       Status: Opinion => Invalid

** Changed in: linux-oem (Ubuntu Bionic)
       Status: New => In Progress

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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-oem in Ubuntu.
https://bugs.launchpad.net/bugs/1811337

Title:
  To reduce the Realtek USB cardreader power consumption

Status in HWE Next:
  New
Status in linux package in Ubuntu:
  In Progress
Status in linux-oem package in Ubuntu:
  Invalid
Status in linux source package in Bionic:
  In Progress
Status in linux-oem source package in Bionic:
  In Progress
Status in linux source package in Cosmic:
  In Progress
Status in linux-oem source package in Cosmic:
  Invalid
Status in linux source package in Disco:
  In Progress
Status in linux-oem source package in Disco:
  Invalid

Bug description:
  [Impact]
  Realtek USB cardreader consumes more than 1 Watt during long idle if it's not 
suspended. And it's runtime PM functions are available after v4.20.

  [Fix]
  To avoid conflicts, have to backport some patches for mmc core.

  [Test]
  Note: Inside () are the previous value (non-patch)
  Sort idle: 7.76W (7.88)
  Long idle: 4.658W (5.79)
  S3: 0.5W (0.5)
  S5: 0.20W (0.208)

  [Regression Potential]
  Low, most commits are for rtsx_usb_{sdmmc,ms} and are all small changes.

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