@Balint I tried three times, and 0.95-16.04.0rbalint1 didn't work well.
Please refer to attached file for detailed log. 1) Reboot system when unattended upgrades starts to download packages. //unattended-upgrades.log 2017-08-08 15:34:07,782 INFO Starting unattended upgrades script 2017-08-08 15:34:07,782 INFO Allowed origins are: ['o=Ubuntu,a=xenial', 'o=Ubuntu,a=xenial-security', 'o=UbuntuESM,a=xenial'] //unattended-upgrades-shutdown.log 2017-08-08 15:36:06,358 INFO - All upgrades installed The log shows "All upgrades installed", but there is no package installed. 2) Reboot system after unattended upgrades downloads packages for 5mins //unattended-upgrades.log 2017-08-08 15:55:27,907 INFO Starting unattended upgrades script 2017-08-08 15:55:27,907 INFO Allowed origins are: ['o=Ubuntu,a=xenial', 'o=Ubuntu,a=xenial-security', 'o=UbuntuESM,a=xenial'] System reboots immediately. There is no unattended-upgrades-shutdown log. 3) Reboot system when unattended upgrades starts to download packages. //unattended-upgrades.log 2017-08-08 16:09:03,548 INFO Starting unattended upgrades script 2017-08-08 16:09:03,549 INFO Allowed origins are: ['o=Ubuntu,a=xenial', 'o=Ubuntu,a=xenial-security', 'o=UbuntuESM,a=xenial'] //unattended-upgrades-shutdown.log 2017-08-08 16:10:50,573 INFO - All upgrades installed The log shows "All upgrades installed", but there is no package installed. --- The 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_0.95-16.04.0rbalint1_all.deb ** Attachment added: "unattended-upgrades-shutdown.log, unattended-upgrades.log, apt log, and dpkg log" https://bugs.launchpad.net/oem-priority/+bug/1690980/+attachment/4928762/+files/log_0808.tar.gz -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1690980 Title: unattended-upgrades does not block shutdown of system, as it is designed to To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1690980/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs