[Bug 1464917] Re: reboot hangs at 'Reached target Shutdown'

[xtrchessreal]

I am no expert but I looked into the systemd shutdown.target as well and found no parameters that can be changed.  I also performed a swap test where I loaded the swap partition to over 54% roughly 4.2 gig while my ram was at 87% full.  I have 3.7 gig ram available and 8.1 gig swap on my machine.  I loaded the system using Gimp opening and entire folder of photos, opening a browser and streaming a youtube movie. I then closed all applications and waited for 20 minutes with the monitor open. The swap file did lose half of its stored data to about 2 gig but then it seemed to pause at that point for a long time, longer than I was willing to wait.  I then ran:
sudo swapoff -a && systemctl poweroff

The swapoff process took another 10+ minutes and then the shutdown took
place without the hang.

It is my belief that the swap management app/function built into the OS
is the issue or at least part of it.

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Title:
  reboot hangs at 'Reached target Shutdown'

Status in systemd:
  New
Status in systemd package in Ubuntu:
  Confirmed

Bug description:
  I rebooted my 15.04 system, and found it hanging indefinitely at the
  plymouth shutdown screen.  Hitting esc to reveal the console showed a
  normal set of shutdown messages, ending with 'Reached target Shutdown'
  (paraphrased from memory).

  The system never rebooted on its own.  I had to use SysRq to finish
  the shutdown.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: systemd 219-7ubuntu6
  ProcVersionSignature: Ubuntu 3.19.0-20.20-generic 3.19.8
  Uname: Linux 3.19.0-20-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1.1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sat Jun 13 11:53:10 2015
  InstallationDate: Installed on 2010-09-24 (1723 days ago)
  InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1)
  MachineType: LENOVO 2306CTO
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-20-generic root=/dev/mapper/hostname-root ro quiet splash vt.handoff=7
  SourcePackage: systemd
  UpgradeStatus: Upgraded to vivid on 2014-12-06 (189 days ago)
  dmi.bios.date: 10/25/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: G2ET97WW (2.57 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 2306CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Defined
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrG2ET97WW(2.57):bd10/25/2013:svnLENOVO:pn2306CTO:pvrThinkPadX230:rvnLENOVO:rn2306CTO:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2306CTO
  dmi.product.version: ThinkPad X230
  dmi.sys.vendor: LENOVO

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