[Bug 1661611] Re: apt/unattended-upgrades stalls shutdown

[Brian Murray]

apt_pkg.config.find_b() returns a boolean not a string.

"find_b(key[, default=False]) → bool Return the boolean value stored at
key, or the value given by the bool object default if the requested
option is not set."

>From apt.alioth.debian.org/python-apt-
doc/library/apt_pkg.html#apt_pkg.config.find_b

So it's not a bug in unattended-upgrade-shutdown as checking for False
is correct.

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https://bugs.launchpad.net/bugs/1661611

Title:
  apt/unattended-upgrades stalls shutdown

Status in unattended-upgrades package in Ubuntu:
  Incomplete

Bug description:
  When unattended-upgrades is installed, 9 out of 10 shutdowns/reboots
  hang while "starting unattended upgrades shutdown". This hang stalls
  the shutdown process for 5-10 mins.

  If I disable unnattended-upgrades via the /etc/apt/apt.conf.d/20auto-
  upgrades and/or 50unattended-upgrades, the problems occurs.

  If I terminate the service before shutdown/reboot (sudo service
  unattended-upgrades stop) the problem still occurs.

  If I remove the package (sudo apt remove unattended-upgrades) the
  problem no longer occurs.

  This occurs on a freshly installed version of Ubuntu Server 16.04.1
  (both unattended-upgrades installed via install GUI or manual install
  of unattended-upgrades)

  Both Kern.log & syslog do not show the shutdown process (I believe
  because the filesystems have already unmounted)

  Original report: http://askubuntu.com/questions/878630/apt-unattended-
  upgrades-stalls-shutdown

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