I ran the same test in Zesty and observed the same behavior as in Yakkety.
$ cat /var/log/unattended-upgrades/unattended-upgrades-shutdown.log 2017-05-24 15:21:05,408 WARNING - Unattended-upgrade in progress during shutdown, sleeping for 5s Progress: 56.7568 % (libvirt-bin) 2017-05-24 15:21:10,425 INFO - All upgrades installed [ 3:30PM 9033 ] [ bdmurray@speedy:~ ] $ apt-cache policy unattended-upgrades unattended-upgrades: Installed: 0.93.1ubuntu2.2 Candidate: 0.93.1ubuntu2.2 Version table: *** 0.93.1ubuntu2.2 500 500 http://192.168.10.7/ubuntu zesty-updates/main amd64 Packages 500 http://192.168.10.7/ubuntu zesty-updates/main i386 Packages 100 /var/lib/dpkg/status
I ran the same test in Zesty and observed the same behavior as in Yakkety.
$ cat /var/log/ unattended- upgrades/ unattended- upgrades- shutdown. log upgrades: 192.168. 10.7/ubuntu zesty-updates/main amd64 Packages 192.168. 10.7/ubuntu zesty-updates/main i386 Packages dpkg/status
2017-05-24 15:21:05,408 WARNING - Unattended-upgrade in progress during shutdown, sleeping for 5s
Progress: 56.7568 % (libvirt-bin)
2017-05-24 15:21:10,425 INFO - All upgrades installed
[ 3:30PM 9033 ] [ bdmurray@speedy:~ ]
$ apt-cache policy unattended-upgrades
unattended-
Installed: 0.93.1ubuntu2.2
Candidate: 0.93.1ubuntu2.2
Version table:
*** 0.93.1ubuntu2.2 500
500 http://
500 http://
100 /var/lib/