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[vince <1384968@xxxxxxxxxxxxxxxxxx>]

apport information

** Attachment added: "BootDmesg.txt"
   https://bugs.launchpad.net/bugs/1384968/+attachment/4243205/+files/BootDmesg.txt

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https://bugs.launchpad.net/bugs/1384968

Title:
  Screen goes black at random times

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  After upgrading from 14.04 to 14.10 my screen goes black at random times.
  The sound keeps playing so I know it's still running.
  The only way I can get the screen back is by pressing the power button, which will show the shutdown selection window and unblackens the screen.
  My laptop is a Lenovo ideapad z580
  Intel Core i7-3520M
  integrated graphics
  6 gb ram
  Ubuntu 14.10 64-bit
  --- 
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/pcmC0D0p:   vince      2727 F...m pulseaudio
   /dev/snd/controlC0:  vince      2727 F.... pulseaudio
   /dev/snd/seq:        timidity   1561 F.... timidity
  DistroRelease: Ubuntu 14.10
  HibernationDevice: RESUME=UUID=dc29efba-2e6b-4375-b894-d5a0f60cd103
  InstallationDate: Installed on 2014-05-09 (167 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: LENOVO IdeaPad Z580
  NonfreeKernelModules: wl
  Package: linux (not installed)
  ProcEnviron:
   LANGUAGE=nl
   TERM=xterm
   PATH=(custom, no user)
   LANG=nl_NL.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.16.0-23-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.16.0-23.31-generic 3.16.4
  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-3.16.0-23-generic N/A
   linux-backports-modules-3.16.0-23-generic  N/A
   linux-firmware                             1.138
  Tags:  utopic
  Uname: Linux 3.16.0-23-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  WifiSyslog:
   
  _MarkForUpload: True
  dmi.bios.date: 08/03/2012
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 5FCN35WW
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: Lenovo
  dmi.board.vendor: LENOVO
  dmi.board.version: Lenovo Z580
  dmi.chassis.asset.tag: Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: Intel Corporation
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnLENOVO:bvr5FCN35WW:bd08/03/2012:svnLENOVO:pnIdeaPadZ580:pvrLenovoZ580:rvnLENOVO:rnLenovo:rvrLenovoZ580:cvnIntelCorporation:ct9:cvr0.1:
  dmi.product.name: IdeaPad Z580
  dmi.product.version: Lenovo Z580
  dmi.sys.vendor: LENOVO

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