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[Romain <1473721@xxxxxxxxxxxxxxxxxx>]

The status reported by the ACPI is actually incorrect:

romain@tolkien:~$ cat /proc/acpi/button/lid/LID0/state 
state:      closed

Of course, the screen is opened when I run this command…

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https://bugs.launchpad.net/bugs/1473721

Title:
  Computer going to sleep mode after a few seconds

Status in systemd package in Ubuntu:
  New

Bug description:
  After migrating to 15.04, the computer will go to sleep after a few
  seconds.

  Investigations seems to link this behaviour with an incorrect LID signal processed by systemd.
  Changing the systemd-logind service configuration to ignore the "HandleLidSwitch" event works around this issue.

  Happy to investigate this further with appropriate steps to perform :)

  Steps to repro:
  1. Log in to session
  2. Wait around 10 seconds

  Actual:
  The computer goes to sleep mode

  Expected:
  The computer remains on

  Attached journald export of a repro. Please note the systemd-logind
  request for suspending.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: systemd 219-7ubuntu6
  ProcVersionSignature: Ubuntu 3.16.0-43.58-generic 3.16.7-ckt13
  Uname: Linux 3.16.0-43-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1.1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sun Jul 12 12:08:07 2015
  InstallationDate: Installed on 2015-05-03 (70 days ago)
  InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
  MachineType: LENGDA Montevina platform
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.16.0-43-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  SourcePackage: systemd
  UpgradeStatus: Upgraded to vivid on 2015-07-12 (0 days ago)
  dmi.bios.date: 07/08/2011
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 4.6.3
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: Montevina platform
  dmi.board.vendor: LENGDA
  dmi.board.version: To be filled by O.E.M.
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENGDA
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr4.6.3:bd07/08/2011:svnLENGDA:pnMontevinaplatform:pvrTobefilledbyO.E.M.:rvnLENGDA:rnMontevinaplatform:rvrTobefilledbyO.E.M.:cvnLENGDA:ct10:cvrToBeFilledByO.E.M.:
  dmi.product.name: Montevina platform
  dmi.product.version: To be filled by O.E.M.
  dmi.sys.vendor: LENGDA
  mtime.conffile..etc.systemd.logind.conf: 2015-07-12T11:52:32.597961

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