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[R Robinson <rr928212@xxxxxxxxx>]

** Tags added: kernel-fixed-upstream

** Changed in: linux (Ubuntu)
       Status: Incomplete => Confirmed

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https://bugs.launchpad.net/bugs/1574128

Title:
  Blank laptop screen

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Since the upgrade to 3.13.0-85-generic, my laptop screen is blank from
  when I would normally see the 'Kubuntu' logo at boot time onwards. An
  external monitor still works OK. I can see that the laptop backlight
  is on but the display is black.

  If I select 3.13.0-83-generic from the grub menu, everything works OK.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-85-generic 3.13.0-85.129
  ProcVersionSignature: Ubuntu 3.13.0-85.129-generic 3.13.11-ckt36
  Uname: Linux 3.13.0-85-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  tom        2370 F.... pulseaudio
   /dev/snd/controlC0:  tom        2370 F.... pulseaudio
  CurrentDesktop: KDE
  Date: Sat Apr 23 23:16:23 2016
  HibernationDevice: RESUME=UUID=ace2d751-8189-4d15-af74-400039ff0c8f
  InstallationDate: Installed on 2014-06-07 (686 days ago)
  InstallationMedia: Kubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.1)
  MachineType: SAMSUNG ELECTRONICS CO., LTD. 900X3G
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-85-generic.efi.signed root=UUID=cc0b4c31-1aa1-4c9d-88af-97ca40f80655 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-85-generic N/A
   linux-backports-modules-3.13.0-85-generic  N/A
   linux-firmware                             1.127.22
  SourcePackage: linux
  StagingDrivers: rts5139
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/31/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: P07ADU.029.141031.PS
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: NP900X3G-K02FR
  dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.board.version: SAMSUNG_SW_REVISION_1234567890ABCD
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP07ADU.029.141031.PS:bd10/31/2014:svnSAMSUNGELECTRONICSCO.,LTD.:pn900X3G:pvrP07ADU:rvnSAMSUNGELECTRONICSCO.,LTD.:rnNP900X3G-K02FR:rvrSAMSUNG_SW_REVISION_1234567890ABCD:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvrN/A:
  dmi.product.name: 900X3G
  dmi.product.version: P07ADU
  dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.

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