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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1535513

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

** Tags added: vivid

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https://bugs.launchpad.net/bugs/1535513

Title:
  Enable suspend function for i2c-hid device in Vivid

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  [Impact]
  On some platforms the touchpad relies on pinctrl devices to provide GPIO interrupt, but in 3.19.0 pinctrl-cherryview doesn't support suspend well and will lose the config after suspend/resume, then touchpad can't be used.

  Also, there is a racing condition in i2c-hid module which makes
  touchpad unusable when waking up.

  [Fix]
  This fix has two parts. First part is to enable the suspend/resume function in pinctrl-cherryview:

  commit 9eb457b547cc731bc2fc251bd79891a60c64fc3e
  Refs: [HEAD]
  Author: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
  Date: Thu Dec 4 12:32:50 2014 +0200

      pinctrl: cherryview: Save and restore pin configs over system
  sleep

  The second part is to eliminate the racing condition in i2c-hid:

  commit 9a327405014f4ef4cdad67a0686db82b9f23c62c 
  Author: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
  Date:   Mon Dec 21 15:26:31 2015 +0200

      HID: i2c-hid: Prevent sending reports from racing with device
  reset

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