[Bug 1690980] Re: unattended-upgrades does not block shutdown of system, as it is designed to

[ethan.hsieh]

@Balint

unattended-upgrades didn't finish online-update.
https://launchpad.net/~rbalint/+archive/ubuntu/scratch/+packages
unattended-upgrades: (0.93.2~16.04.0+rbalint2）
apt:（1.2.25~rbalint2）

Here are logs:

/var/log/unattended-upgrades/unattended-upgrades.log 
2017-07-26 15:58:59,769 INFO Initial blacklisted packages: 
2017-07-26 15:58:59,770 INFO Initial whitelisted packages: 
2017-07-26 15:58:59,770 INFO Starting unattended upgrades script
2017-07-26 15:58:59,770 INFO Allowed origins are: ['o=Ubuntu,a=xenial', 'o=Ubuntu,a=xenial-security', 'o=UbuntuESM,a=xenial']
2017-07-26 16:03:53,918 WARNING SIGTERM received, will stop
2017-07-26 16:03:54,073 WARNING SIGTERM received, will stop
2017-07-26 16:03:55,082 WARNING SIGTERM received, will stop

/var/log/unattended-upgrades/unattended-upgrades-shutdown.log 
2017-07-26 16:03:54,924 WARNING - Unattended-upgrade in progress during shutdown, sleeping for 5s
2017-07-26 16:04:00,607 INFO - All upgrades installed

Installed packages:
apt_1.2.25-rbalint2_amd64.deb
apt-doc_1.2.25-rbalint2_all.deb
apt-transport-https_1.2.25-rbalint2_amd64.deb
apt-utils_1.2.25-rbalint2_amd64.deb
libapt-inst2.0_1.2.25-rbalint2_amd64.deb
libapt-pkg5.0_1.2.25-rbalint2_amd64.deb
libapt-pkg-doc_1.2.25-rbalint2_all.deb
unattended-upgrades_0.93.2-16.04.0+rbalint2_all.deb

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https://bugs.launchpad.net/bugs/1690980

Title:
  unattended-upgrades does not block shutdown of system, as it is
  designed to

Status in OEM Priority Project:
  Triaged
Status in OEM Priority Project xenial series:
  New
Status in apt package in Ubuntu:
  New
Status in unattended-upgrades package in Ubuntu:
  Confirmed

Bug description:
  Title: No pop-up window to warn users that system should not reboot or
  shutdown while installing security updates

  Summary:
  No pop-up window to warn users that system should not reboot or shutdown while installing security updates

  Steps:
  1. trigger unattended-upgrades
  2. reboot or shutdown system while installing packages

  Expected results: There is a pop-up window to warn users that system
  should not reboot or shutdown

  Actual results: There is no pop-up window to warn users

  Additional information:
  $ apt-cache policy unattended-upgrades
  unattended-upgrades:
    Installed: 0.90
    Candidate: 0.90ubuntu0.5
  $ lsb_release -rd
  Description:    Ubuntu 16.04 LTS

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