[Bug 1619844] Re: [Xenial] shutdown/reboot hangs at "Reached target Shutdown"

[Dimitri John Ledkov]

It depends on what sort of raid modes are in place. If you are not using
raid (e.g. RAID1) as provided by your motherboard firmware, and only use
individual devices, it is best to disable raid settings in the bios and
use regular acpi setting. I have to do this for example on latest
generation of Dell XPS laptops that use "raid" mode on a single nvme
drive with OS support drivers that are not available for linux.

Otherwise if you do use RAID controllers with mdadm, e.g. Intel Matrix
RAID, DDF, etc. as part of
https://bugs.launchpad.net/ubuntu/+source/mdadm/+bug/1722491 there is
currently mdadm update available from xenial-proposed and zesty-proposed
that might resolve this issue.

To test that solution please perform the following:

1) Install mdadm from xenial-proposed/zesty-proposed
   - See https://wiki.ubuntu.com/Testing/EnableProposed
   - Or download & install packages from
xenial
https://launchpad.net/ubuntu/+source/mdadm/3.4-4ubuntu0.1/+build/13596415
zesty
https://launchpad.net/ubuntu/+source/mdadm/3.3-2ubuntu7.5/+build/13596431

2) $ sudo apt install dracut-core

3) $ sudo systemctl enable mdadm-shutdown.service

4) $ sudo systemctl start mdadm-shutdown.service

After this the expectation is for shutdown/reboots to perform clean a
shutdown, maintaining the raid array in a synced state, such that it
comes up clean.

Please let me know if above resolves shutdown/reboot issues for you.

Regards,

Dimitri.

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https://bugs.launchpad.net/bugs/1619844

Title:
  [Xenial] shutdown/reboot hangs at "Reached target Shutdown"

Status in systemd package in Ubuntu:
  Confirmed

Bug description:
  I tried getting more information in the debug-shell but I was
  unsuccessful in doing so. I was able to switch to the debug shell via
  ctrl+alt+f9 but I couldn't actually type anything in. I could switch
  back to the stuck shutdown screen via ctrl+alt+f1, and hitting NumLock
  would turn the light on my keyboard on and off, but I couldn't do
  anything else. I captured a journal of the stuck reboot.
  Interestingly, the journal shows a few more lines after "Reached
  target Shutdown", which is as far as I get on my screen.

  This system was installed with Xenial 16.04.1 (never been upgraded)
  and has had this problem since the very first boot.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: systemd 229-4ubuntu7
  ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16
  Uname: Linux 4.4.0-36-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  Date: Sat Sep  3 00:33:19 2016
  InstallationDate: Installed on 2016-08-17 (16 days ago)
  InstallationMedia: Ubuntu-Server 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  ProcEnviron:
   SHELL=/bin/bash
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-36-generic.efi.signed root=UUID=5f709fed-48c9-4830-87be-acd13f263eb1 ro
  SourcePackage: systemd
  SystemdDelta:
   [EXTENDED]   /lib/systemd/system/systemd-timesyncd.service → /lib/systemd/system/systemd-timesyncd.service.d/disable-with-time-daemon.conf
   [EXTENDED]   /lib/systemd/system/rc-local.service → /lib/systemd/system/rc-local.service.d/debian.conf
   [EXTENDED]   /lib/systemd/system/mariadb.service → /etc/systemd/system/mariadb.service.d/migrated-from-my.cnf-settings.conf
   
   3 overridden configuration files found.
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 06/03/2016
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: KYSKLi70.86A.0037.2016.0603.1032
  dmi.board.name: NUC6i7KYB
  dmi.board.vendor: Intel Corporation
  dmi.board.version: H90766-404
  dmi.chassis.type: 3
  dmi.chassis.vendor: Intel Corporation
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrKYSKLi70.86A.0037.2016.0603.1032:bd06/03/2016:svn:pn:pvr:rvnIntelCorporation:rnNUC6i7KYB:rvrH90766-404:cvnIntelCorporation:ct3:cvr1.0:

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