[Bug 1670291] Re: Landscape: Upgrade 14.04.5 to 16.04.2 fails unable to reboot

[Dimitri John Ledkov]

In general, scheduling with shutdown command should work. E.g. tested in
lxd container that `$ sudo shutdown +4` works correctly.

I wonder if landscape is affected by:
"""
If the time argument is used, 5 minutes before the system goes down the
/run/nologin file is created to ensure that further logins shall not be
allowed.
"""

Also, I see that 'halt' is used, instead of 'poweroff' in landscape, why
is that? I would have thought 'poweroff' is more appropriate (shutdown
-P +4, or just shutdown +4)

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https://bugs.launchpad.net/bugs/1670291

Title:
  Landscape: Upgrade 14.04.5 to 16.04.2 fails unable to reboot

Status in landscape-client package in Ubuntu:
  Fix Committed
Status in systemd package in Ubuntu:
  Incomplete
Status in landscape-client source package in Xenial:
  Confirmed
Status in systemd source package in Xenial:
  Incomplete

Bug description:
  Used Landscape (Paid Canonical Subscription) to upgrade one of my
  machines.

  Landscape only shows "In Progress" for more than 8 hours now and asked
  for a reboot of the machine in a second alert.

  In the reboot attempt I get the message:
  =========================
  Failed to set wall message, ignoring: Method "SetWallMessage" with signature "sb" on interface "org.freedesktop.login1.Manager" doesn't exist
  Failed to call ScheduleShutdown in logind, proceeding with immediate shutdown: Method "ScheduleShutdown" with signature "st" on interface "org.freedesktop.login1.Manager" doesn't exist
  =========================

  Steps to reproduce:
  * Fully updated 14.04.5 machine
  * Open Landscape
  * Choose the machine
  * Choose Packages
  * This computer can be upgraded to a newer release
  * Apply
  * Wait 2 hours
  * Alert comes in a seperate Landscape message Machine is ready for reboot
  * Choose Info... Power
  * Deliver to selected computers as soon as possible
  * Error message

  I found this thread on reddit about this issue maybe the solution can be built into the upgrade script
  https://www.reddit.com/r/linuxquestions/comments/4wy3go/trying_to_run_as_user_instance_but_the_system_has/

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