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[Marcel Beerli <admin@xxxxxxxxxx>]

This did not happen with 15.10 on the Dell Computer
I upgrade a 2nd computer to 16.04 and there in order to get VMware V11 to open the Image, I had to turn off Secure Boot in the ASUS Bios. (Probably unrelated)
But yes this only happens with 16.04 after Suspend Mode which we use quite often to reduce the boot time on this older computer.

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https://bugs.launchpad.net/bugs/1596134

Title:
  black screen after Suspend Mode

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  This is a dell workstation and many times after a suspend mode the
  monitor stays black.

  PS: Choosing a package is very hard here. Either to many matches or no
  match, I get nothing in between

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-24-generic 4.4.0-24.43
  ProcVersionSignature: Ubuntu 4.4.0-24.43-generic 4.4.10
  Uname: Linux 4.4.0-24-generic i686
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  rbeerli    3158 F.... pulseaudio
   /dev/snd/controlC0:  rbeerli    3158 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sat Jun 25 05:18:14 2016
  HibernationDevice: RESUME=UUID=db7fb9f9-2ba1-429b-8466-8967a61b8dc7
  InstallationDate: Installed on 2014-05-24 (762 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release i386 (20140417)
  IwConfig:
   lo        no wireless extensions.
   
   eth0      no wireless extensions.
  MachineType: Dell Inc. Dell DXP051
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-24-generic root=UUID=43af0a01-14c0-448b-8fcc-0c23db678b97 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-24-generic N/A
   linux-backports-modules-4.4.0-24-generic  N/A
   linux-firmware                            1.157
  RfKill:
   
  SourcePackage: linux
  UpgradeStatus: Upgraded to xenial on 2016-06-11 (13 days ago)
  dmi.bios.date: 05/30/2006
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A05
  dmi.board.name: 0FJ030
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 7
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA05:bd05/30/2006:svnDellInc.:pnDellDXP051:pvr:rvnDellInc.:rn0FJ030:rvr:cvnDellInc.:ct7:cvr:
  dmi.product.name: Dell DXP051
  dmi.sys.vendor: Dell Inc.

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