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[Keng-Yu Lin <keng-yu.lin@xxxxxxxxxxxxx>]

** Changed in: hwe-next
     Assignee: Keng-Yu Lin (lexical) => Robert Hooker (sarvatt)

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https://bugs.launchpad.net/bugs/1442487

Title:
  [Dell Inspiron 3147] blackscreen in some scenarios

Status in HWE Next Project:
  Incomplete
Status in linux-lts-utopic package in Ubuntu:
  Incomplete

Bug description:
  CID 201403-14889
  with updated 14.04.2 (3.16.0-34-generic #45~14.04.1)

  Steps to reproduce this bug:
  scenario A:
  connected external HDMI --> settings --> display --> try different display mode --> built-in screen will be black but alt+b+prntScr works. (external monitor still works)

  scenario B:
  system power on --> try to boot desktop --> could not boot to desktop , built-in screen will be black but alt+b+prntScr works.
  failure rate: 1 out 3

  ---------------------------------------------

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.16.0-34-generic 3.16.0-34.45~14.04.1
  ProcVersionSignature: Ubuntu 3.16.0-34.45~14.04.1-generic 3.16.7-ckt8
  Uname: Linux 3.16.0-34-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.8
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Fri Apr 10 13:56:51 2015
  InstallationDate: Installed on 2015-04-09 (0 days ago)
  InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
  SourcePackage: linux-lts-utopic
  UpgradeStatus: No upgrade log present (probably fresh install)
  --- 
  ApportVersion: 2.14.1-0ubuntu3.8
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ubuntu     1654 F.... pulseaudio
  CRDA:
   country TW:
   	(2402 - 2472 @ 40), (3, 27)
   	(5270 - 5330 @ 40), (3, 17), DFS
   	(5735 - 5815 @ 40), (3, 30)
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 14.04
  HibernationDevice: RESUME=UUID=442dffc7-a562-4b0d-a6d6-cb69d6891c61
  InstallationDate: Installed on 2015-04-09 (0 days ago)
  InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
  MachineType: Dell Inc. Inspiron 11 - 3147
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-34-generic.efi.signed root=UUID=da9b59f7-7780-41c5-9e5f-03acb414b69e ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.16.0-34.45~14.04.1-generic 3.16.7-ckt8
  RelatedPackageVersions:
   linux-restricted-modules-3.16.0-34-generic N/A
   linux-backports-modules-3.16.0-34-generic  N/A
   linux-firmware                             1.127.11
  Tags:  trusty
  Uname: Linux 3.16.0-34-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 08/22/2014
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: X30
  dmi.board.name: 00K010
  dmi.board.vendor: Dell Inc.
  dmi.board.version: D02
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: X30
  dmi.modalias: dmi:bvnDellInc.:bvrX30:bd08/22/2014:svnDellInc.:pnInspiron11-3147:pvr:rvnDellInc.:rn00K010:rvrD02:cvnDellInc.:ct8:cvrX30:
  dmi.product.name: Inspiron 11 - 3147
  dmi.sys.vendor: Dell Inc.

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