We need a different solution here since we never stop reading from the
the touchscreen when the screen is off. Instead the hardware is turned
off so it never sends a release..

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https://bugs.launchpad.net/bugs/1549701

Title:
  Sometimes devices don't suspend - display turns back on immediately

Status in Canonical System Image:
  Confirmed
Status in mir package in Ubuntu:
  Confirmed
Status in unity-system-compositor package in Ubuntu:
  New
Status in unity8 package in Ubuntu:
  New

Bug description:
  current build number: 267
  device name: krillin
  channel: ubuntu-touch/rc-proposed/bq-aquaris.en

  it happens also on arale.

  sometimes the screen lock timeout is not honoured and the devices
  don't suspend when the lock timeout expires (display doesn' t turn
  off)

  $ sudo powerd-cli list
  [sudo] password for phablet:
  System State Requests:
    Name: com.canonical.Unity.Screen, Owner: :1.14, State: 1

  Steps to reproduce on arale:

  1. Turn on the screen
  2. Touch the circular touch button at the lower part of the device
  3. Press/release the power button to turn off screen
  4. Release the circular touch button

  Expected results: The screen turns off and further on/off cycles work properly
  Actual results: The screen stays on and attempts to turn it off fail

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