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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

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

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https://bugs.launchpad.net/bugs/1423917

Title:
  System hangs when screen closed

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  If I close the screen on my laptop (Thinkpad W530) the system will freeze.
  Nothing functions at all, including reisub.
  However, the fn/space bar still turns the keyboard backlight on / off; that is working perfectly.
  The volume / must buttons still toggle the 'mute' led on/off.
  But the screen is frozen, the power button must be held for 5 seconds to power down the system.
  There is noting in the logs to indicate anything at all happens after the system hangs, they just... stop.

  After doing a hard boot, the system comes back up to grub, and then to a flashing white cursor on a black background.  I've left it at this screen for 45 minutes, and it goes no further.
  Doing another power-button force restart, it comes up to a dark gray cursor on a black background.
  Doing a force restart from here will allow it to boot normally...  although, about 25% of the time when it boots 'normally', it will take me to a CLI login promt, and then after I log in, it will take me to a GUI login prompt.

  When I am finally able to get it rebooted, there is nothing to be
  found in the logs that indicate anything was logged at all when it was
  sitting at the flashing cursors.

  We have 25 W530 and W520 machines, they are all behaving the same way.

  lsb_release -rd says 
  Description:	Ubuntu 14.04.2 LTS
  Release:	14.04

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-45-generic 3.13.0-45.74
  ProcVersionSignature: Ubuntu 3.13.0-45.74-generic 3.13.11-ckt13
  Uname: Linux 3.13.0-45-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.1-0ubuntu3.7
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  greg       2120 F.... pulseaudio
   /dev/snd/controlC0:  greg       2120 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Fri Feb 20 08:50:49 2015
  HibernationDevice: RESUME=UUID=b1125bd3-92e0-466b-b0ef-d9980cf3cac2
  InstallationDate: Installed on 2014-12-19 (62 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  MachineType: LENOVO 243852U
  ProcFB:
   
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-45-generic root=UUID=ad92fac0-fc9d-418e-a38e-1c557b689333 ro quiet splash
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-45-generic N/A
   linux-backports-modules-3.13.0-45-generic  N/A
   linux-firmware                             1.127.11
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/22/2014
  dmi.bios.vendor: LENOVO
  dmi.bios.version: G5ETA0WW (2.60 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 243852U
  dmi.board.vendor: LENOVO
  dmi.board.version: Win8 Pro DPK TPG
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrG5ETA0WW(2.60):bd08/22/2014:svnLENOVO:pn243852U:pvrThinkPadW530:rvnLENOVO:rn243852U:rvrWin8ProDPKTPG:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 243852U
  dmi.product.version: ThinkPad W530
  dmi.sys.vendor: LENOVO

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