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[bp0 <1416557@xxxxxxxxxxxxxxxxxx>]

I've done a bit more narrowing down on this and found that the problem
occurs between kernel 3.14.51 and kernel 3.15.0-RC1. I know this isn't
kernel bisecting (haven't done this before so will give it a go but not
sure whether I'll be successful).

Oddly, in Ubuntu 14.10, I can suspend/resume fine with kernel 3.16.0-38,
but this doesn't work in 15.04. Odd.

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https://bugs.launchpad.net/bugs/1416557

Title:
  [Acer Aspire V5-573G] suspend/resume failure

Status in linux package in Ubuntu:
  Expired

Bug description:
  Black screen on resume after suspend

  ProblemType: KernelOops
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.18.0-12-generic 3.18.0-12.13
  ProcVersionSignature: Ubuntu 3.18.0-12.13-generic 3.18.4
  Uname: Linux 3.18.0-12-generic x86_64
  Annotation: This occured during a previous suspend and prevented it from resuming properly.
  ApportVersion: 2.15.1-0ubuntu4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  lightdm    1668 F.... pulseaudio
                        valeronm   2143 F.... pulseaudio
   /dev/snd/controlC0:  lightdm    1668 F.... pulseaudio
                        valeronm   2143 F.... pulseaudio
  Date: Fri Jan 30 23:39:37 2015
  DuplicateSignature: suspend/resume:Acer Aspire V5-573G:V2.29
  ExecutablePath: /usr/share/apport/apportcheckresume
  Failure: suspend/resume
  HibernationDevice: RESUME=UUID=2b5c8acc-3a16-4e7f-97ba-5f4d5d564e7c
  InstallationDate: Installed on 2015-01-30 (0 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20150130)
  InterpreterPath: /usr/bin/python3.4
  MachineType: Acer Aspire V5-573G
  ProcCmdline: /usr/bin/python3 /usr/share/apport/apportcheckresume
  ProcEnviron:
   TERM=linux
   PATH=(custom, no user)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.18.0-12-generic.efi.signed root=UUID=eca5cdef-c2d4-4af6-a5e2-a11289cc9cfc ro quiet splash vt.handoff=7
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.18.0-12-generic N/A
   linux-backports-modules-3.18.0-12-generic  N/A
   linux-firmware                             1.141
  SourcePackage: linux
  Title: [Acer Aspire V5-573G] suspend/resume failure
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

  dmi.bios.date: 06/05/2014
  dmi.bios.vendor: Insyde Corp.
  dmi.bios.version: V2.29
  dmi.board.asset.tag: Type2 - Board Asset Tag
  dmi.board.name: Dazzle_HW
  dmi.board.vendor: Acer
  dmi.board.version: Type2 - A01 Board Version
  dmi.chassis.type: 10
  dmi.chassis.vendor: Chassis Manufacturer
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnInsydeCorp.:bvrV2.29:bd06/05/2014:svnAcer:pnAspireV5-573G:pvrTBDbyOEM:rvnAcer:rnDazzle_HW:rvrType2-A01BoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion:
  dmi.product.name: Aspire V5-573G
  dmi.product.version: TBD by OEM
  dmi.sys.vendor: Acer

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