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[Marcel Beerli <admin@xxxxxxxxxx>]

Same issue other then its not a laptop.
I use the suspend mode quite often and many times keyboard works, but screen stays black.
System is 32bit.
Version is: 4.4.0-24

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https://bugs.launchpad.net/bugs/1586635

Title:
  Ubuntu 16.04 black screen after long suspend

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  When I close the lid in my laptop (Slimbook) for short time, and open
  it again, the system resume perfectly.

  However, when I suspend my PC for long time, when I open the lid, it
  resumes with black screen and keyboard led on. I cant suspend it again
  closing the lid and combination of Ctrl + Alt + F3 not work. Need hard
  shutdown to recover the System.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-23-generic 4.4.0-23.41
  ProcVersionSignature: Ubuntu 4.4.0-23.41-generic 4.4.10
  Uname: Linux 4.4.0-23-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  vk496      1804 F.... pulseaudio
   /dev/snd/controlC1:  vk496      1804 F.... pulseaudio
  CRDA:
   country BO: DFS-JP
   	(2402 - 2482 @ 40), (N/A, 20), (N/A)
   	(5250 - 5330 @ 80), (N/A, 30), (0 ms), DFS
   	(5735 - 5835 @ 80), (N/A, 30), (N/A)
  CurrentDesktop: Unity
  Date: Sat May 28 14:25:57 2016
  HibernationDevice: RESUME=UUID=bac2d5f4-7b92-4141-89f8-147737e447dc
  MachineType: ENZ C16B
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-23-generic.efi.signed root=UUID=90e2ad64-9662-478b-a2b9-110a8336fe59 ro elevator=noop quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-23-generic N/A
   linux-backports-modules-4.4.0-23-generic  N/A
   linux-firmware                            1.157
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/21/2014
  dmi.bios.vendor: INSYDE Corp.
  dmi.bios.version: c
  dmi.board.asset.tag: Type2 - Board Asset Tag
  dmi.board.name: C16B
  dmi.board.vendor: ENZ
  dmi.board.version: Type2 - Board Version
  dmi.chassis.asset.tag: Chassis Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: ENZ
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnINSYDECorp.:bvrc:bd11/21/2014:svnENZ:pnC16B:pvr1.0:rvnENZ:rnC16B:rvrType2-BoardVersion:cvnENZ:ct10:cvrChassisVersion:
  dmi.product.name: C16B
  dmi.product.version: 1.0
  dmi.sys.vendor: ENZ

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