Comment 91 for bug 1690980

Tested 1.1ubuntu1.18.04.7~16.04.2 on Xenial:

root@x-uu-lp-1690980:~# tail -f /var/log/unattended-upgrades/unattended-upgrades.log
2019-04-09 13:08:24,515 INFO Initial blacklisted packages:
2019-04-09 13:08:24,516 INFO Initial whitelisted packages:
2019-04-09 13:08:24,516 INFO Starting unattended upgrades script
2019-04-09 13:08:24,516 INFO Allowed origins are: ['o=Ubuntu,a=xenial', 'o=Ubuntu,a=xenial-security', 'o=UbuntuESM,a=xenial', 'o=Ubuntu,a=xenial-updates']
2019-04-09 15:01:44,987 INFO Initial blacklisted packages:
2019-04-09 15:01:44,988 INFO Initial whitelisted packages:
2019-04-09 15:01:44,988 INFO Starting unattended upgrades script
2019-04-09 15:01:44,988 INFO Allowed origins are: o=Ubuntu,a=xenial, o=Ubuntu,a=xenial-security, o=UbuntuESM,a=xenial, o=Ubuntu,a=xenial-updates
2019-04-09 15:02:06,773 INFO Packages that will be upgraded: adwaita-icon-theme dirmngr fontconfig fontconfig-config gir1.2-gdkpixbuf-2.0 gir1.2-gtk-3.0 glib-networking glib-networking-common glib-networking-services gnupg-agent gnupg2 gstreamer1.0-plugins-base gstreamer1.0-plugins-good gstreamer1.0-pulseaudio gstreamer1.0-x hicolor-icon-theme humanity-icon-theme hwdata libarchive13 libavahi-client3 libavahi-common-data libavahi-common3 libboost-filesystem1.58.0 libboost-iostreams1.58.0 libboost-system1.58.0 libcaca0 libcups2 libdrm-amdgpu1 libdrm-intel1 libdrm-nouveau2 libdrm-radeon1 libegl1-mesa libepoxy0 libexempi3 libfontconfig1 libgbm1 libgd3 libgdk-pixbuf2.0-0 libgdk-pixbuf2.0-common libgl1-mesa-dri libgl1-mesa-glx libglapi-mesa libgraphite2-3 libgstreamer-plugins-base1.0-0 libgstreamer-plugins-good1.0-0 libgstreamer1.0-0 libgtk-3-0 libgtk-3-bin libgtk-3-common libharfbuzz0b libinput10 libjpeg-turbo8 libksba8 liblcms2-2 libllvm3.8 libmirclient9 libmirprotobuf3 libnautilus-extension1a libnspr4 libnss3 libnss3-nssdb libpam-systemd libpulse0 libsane libsane-common libsndfile1 libsoup-gnome2.4-1 libsoup2.4-1 libsystemd0 libtiff5 libtracker-sparql-1.0-0 libudev1 libvorbis0a libvorbisenc2 libwacom-bin libwacom-common libwacom2 libwavpack1 libwayland-client0 libwayland-cursor0 libwayland-egl1-mesa libwayland-server0 libx11-xcb1 libxcursor1 libxkbcommon0 libxpm4 systemd systemd-sysv ubuntu-mono udev wget x11-common
2019-04-09 15:02:06,774 INFO Writing dpkg log to /var/log/unattended-upgrades/unattended-upgrades-dpkg.log
^C
root@x-uu-lp-1690980:~# dbus-send --system --print-reply --dest=org.freedesktop.login1 /org/freedesktop/login1 "org.freedesktop.login1.Manager.Reboot" boolean:false
method return time=1554822131.758122 sender=:1.1 -> destination=:1.7 serial=33 reply_serial=2
root@x-uu-lp-1690980:~#
root@x-uu-lp-1690980:~# tail -f /var/log/unattended-upgrades/unattended-upgrades.log
2019-04-09 13:08:24,516 INFO Allowed origins are: ['o=Ubuntu,a=xenial', 'o=Ubuntu,a=xenial-security', 'o=UbuntuESM,a=xenial', 'o=Ubuntu,a=xenial-updates']
2019-04-09 15:01:44,987 INFO Initial blacklisted packages:
2019-04-09 15:01:44,988 INFO Initial whitelisted packages:
2019-04-09 15:01:44,988 INFO Starting unattended upgrades script
2019-04-09 15:01:44,988 INFO Allowed origins are: o=Ubuntu,a=xenial, o=Ubuntu,a=xenial-security, o=UbuntuESM,a=xenial, o=Ubuntu,a=xenial-updates
2019-04-09 15:02:06,773 INFO Packages that will be upgraded: adwaita-icon-theme dirmngr fontconfig fontconfig-config gir1.2-gdkpixbuf-2.0 gir1.2-gtk-3.0 glib-networking glib-networking-common glib-networking-services gnupg-agent gnupg2 gstreamer1.0-plugins-base gstreamer1.0-plugins-good gstreamer1.0-pulseaudio gstreamer1.0-x hicolor-icon-theme humanity-icon-theme hwdata libarchive13 libavahi-client3 libavahi-common-data libavahi-common3 libboost-filesystem1.58.0 libboost-iostreams1.58.0 libboost-system1.58.0 libcaca0 libcups2 libdrm-amdgpu1 libdrm-intel1 libdrm-nouveau2 libdrm-radeon1 libegl1-mesa libepoxy0 libexempi3 libfontconfig1 libgbm1 libgd3 libgdk-pixbuf2.0-0 libgdk-pixbuf2.0-common libgl1-mesa-dri libgl1-mesa-glx libglapi-mesa libgraphite2-3 libgstreamer-plugins-base1.0-0 libgstreamer-plugins-good1.0-0 libgstreamer1.0-0 libgtk-3-0 libgtk-3-bin libgtk-3-common libharfbuzz0b libinput10 libjpeg-turbo8 libksba8 liblcms2-2 libllvm3.8 libmirclient9 libmirprotobuf3 libnautilus-extension1a libnspr4 libnss3 libnss3-nssdb libpam-systemd libpulse0 libsane libsane-common libsndfile1 libsoup-gnome2.4-1 libsoup2.4-1 libsystemd0 libtiff5 libtracker-sparql-1.0-0 libudev1 libvorbis0a libvorbisenc2 libwacom-bin libwacom-common libwacom2 libwavpack1 libwayland-client0 libwayland-cursor0 libwayland-egl1-mesa libwayland-server0 libx11-xcb1 libxcursor1 libxkbcommon0 libxpm4 systemd systemd-sysv ubuntu-mono udev wget x11-common
2019-04-09 15:02:06,774 INFO Writing dpkg log to /var/log/unattended-upgrades/unattended-upgrades-dpkg.log
2019-04-09 15:02:11,761 WARNING SIGTERM received, will stop
2019-04-09 15:02:14,904 WARNING SIGTERM received, will stop
2019-04-09 15:02:17,763 WARNING SIGTERM received, will stop
2019-04-09 15:02:20,896 WARNING SIGTERM received, will stop
2019-04-09 15:02:23,877 WARNING SIGTERM received, will stop
2019-04-09 15:02:26,774 WARNING SIGTERM received, will stop
2019-04-09 15:02:29,907 WARNING SIGTERM received, will stop
2019-04-09 15:02:29,908 WARNING SIGNAL received, stopping

^C

... and the lxc container restarted nicely.

After logging in u-u can continue:

root@x-uu-lp-1690980:~# unattended-upgrade --verbose
Initial blacklisted packages:
Initial whitelisted packages:
Starting unattended upgrades script
Allowed origins are: o=Ubuntu,a=xenial, o=Ubuntu,a=xenial-security, o=UbuntuESM,a=xenial, o=Ubuntu,a=xenial-updates
Packages that will be upgraded: adwaita-icon-theme dirmngr fontconfig fontconfig-config gir1.2-gdkpixbuf-2.0 gir1.2-gtk-3.0 glib-networking glib-networking-common glib-networking-services gnupg-agent gnupg2 gstreamer1.0-plugins-base gstreamer1.0-plugins-good gstreamer1.0-pulseaudio gstreamer1.0-x hicolor-icon-theme humanity-icon-theme hwdata libarchive13 libavahi-client3 libavahi-common-data libavahi-common3 libboost-filesystem1.58.0 libboost-iostreams1.58.0 libboost-system1.58.0 libcaca0 libcups2 libdrm-amdgpu1 libdrm-intel1 libdrm-nouveau2 libdrm-radeon1 libegl1-mesa libepoxy0 libexempi3 libfontconfig1 libgbm1 libgd3 libgdk-pixbuf2.0-0 libgdk-pixbuf2.0-common libgl1-mesa-dri libgl1-mesa-glx libglapi-mesa libgraphite2-3 libgstreamer-plugins-base1.0-0 libgstreamer-plugins-good1.0-0 libgstreamer1.0-0 libgtk-3-0 libgtk-3-bin libgtk-3-common libharfbuzz0b libinput10 libjpeg-turbo8 libksba8 liblcms2-2 libllvm3.8 libmirclient9 libmirprotobuf3 libnautilus-extension1a libnspr4 libnss3 libnss3-nssdb libpam-systemd libpulse0 libsane libsane-common libsndfile1 libsoup-gnome2.4-1 libsoup2.4-1 libsystemd0 libtiff5 libtracker-sparql-1.0-0 libudev1 libvorbis0a libvorbisenc2 libwacom-bin libwacom-common libwacom2 libwavpack1 libwayland-client0 libwayland-cursor0 libwayland-egl1-mesa libwayland-server0 libx11-xcb1 libxcursor1 libxkbcommon0 libxpm4 systemd systemd-sysv ubuntu-mono udev wget x11-common
Writing dpkg log to /var/log/unattended-upgrades/unattended-upgrades-dpkg.log
(Reading database ... 42805 files and directories currently installed.)
Preparing to unpack .../gir1.2-gdkpixbuf-2.0_2.32.2-1ubuntu1.6_amd64.deb ...
Unpacking gir1.2-gdkpixbuf-2.0:amd64 (2.32.2-1ubuntu1.6) over (2.32.2-1ubuntu1) ...
Setting up gir1.2-gdkpixbuf-2.0:amd64 (2.32.2-1ubuntu1.6) ...
Log ended: 2019-04-09 15:07:10
...