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[kenjo <ken@xxxxxxxxx>]

Turns out that even with the fix to turn off USB (XHC1) as a wakeup
source the system can enter a state where suspend is not happening (we
get woken directly ).

I only seen this once so far and I have no idea why. I did not have time
to do any experiments at the time to try to figure out what was waking
the system up.

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https://bugs.launchpad.net/bugs/1452250

Title:
  suspend/resume brooken on macbook pro  hardware 11.2

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  On ubuntu 15.04 with kernel 3.19.0-16 its not possible to out of the
  box do a suspend.

  if I disable XHC1 as wakeup source in /proc/acpi/wakeup it is now
  possible to suspend.

  echo XHC1 >/proc/acpi/wakeup

  But now resume is problematic. When resuming its possible to get just
  a black screen. Resume is actually working but the backlightis not
  turned on. but since ubuntu now has turned on the screenlock it is not
  possible to use the buttons that controls the backlight to get the
  screen readable again.

  If I type my password in blindly (dont always work) I get back in the
  desktop and then I can use the keys that control the backlight and tus
  get a picture again.

  This is not very user friendly.

  1. we need some way to control the backlight also when the screen is
  locked, this is very important turning on tha lock manualy also
  prevent the backlight key from working.

  2. when resuming something needs to turn on the backlight 100% . (it
  is done often, but sometimes it's black.)

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-16-generic 3.19.0-16.16
  ProcVersionSignature: Ubuntu 3.19.0-16.16-generic 3.19.3
  Uname: Linux 3.19.0-16-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  kenjo      1855 F.... pulseaudio
   /dev/snd/controlC1:  kenjo      1855 F.... pulseaudio
  Date: Wed May  6 13:28:23 2015
  HibernationDevice: RESUME=UUID=761572ed-0a1f-4ea0-9e80-1b6ef6034e6e
  InstallationDate: Installed on 2015-04-09 (26 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Beta amd64 (20150326)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 006: ID 05ac:8289 Apple, Inc.
   Bus 001 Device 002: ID 0a5c:4500 Broadcom Corp. BCM2046B1 USB 2.0 Hub (part of BCM2046 Bluetooth)
   Bus 001 Device 003: ID 05ac:0263 Apple, Inc. Apple Internal Keyboard / Trackpad (MacBook Retina)
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Apple Inc. MacBookPro11,2
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-3.19.0-16-generic.efi.signed root=UUID=f84ca03e-c0d4-45ad-80f3-c45d4ad106dd ro rootflags=subvol=@ noprompt persistent quiet splash vt.handoff=7
  PulseList:
   Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
   No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-16-generic N/A
   linux-backports-modules-3.19.0-16-generic  N/A
   linux-firmware                             1.143
  SourcePackage: linux
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/07/2015
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MBP112.88Z.0138.B14.1501071031
  dmi.board.asset.tag: Base Board Asset Tag#
  dmi.board.name: Mac-3CBD00234E554E41
  dmi.board.vendor: Apple Inc.
  dmi.board.version: MacBookPro11,2
  dmi.chassis.type: 10
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-3CBD00234E554E41
  dmi.modalias: dmi:bvnAppleInc.:bvrMBP112.88Z.0138.B14.1501071031:bd01/07/2015:svnAppleInc.:pnMacBookPro11,2:pvr1.0:rvnAppleInc.:rnMac-3CBD00234E554E41:rvrMacBookPro11,2:cvnAppleInc.:ct10:cvrMac-3CBD00234E554E41:
  dmi.product.name: MacBookPro11,2
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.

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