After a discussion with Michael Vogt I tested this with unattended-upgrades version 0.92ubuntu1.4 from yakkety-updates and observed the shutdown blocked temporarily (message in plymouth about updates being installed) when I shutdown the system with unattended-upgrades running.
I was connected via ssh when running the unattended-upgrades and saw the following:
Preparing to unpack .../18-libreoffice-style-galaxy_1%3a5.2.2-0ubuntu2.1_all.deb ...
Unpacking libreoffice-style-galaxy (1:5.2.2-0ubuntu2.1) over (1:5.2.2-0ubuntu2) ...
Connection to clean-yakkety-amd64 closed by remote host.
Connection to clean-yakkety-amd64 closed.
In plymouth I also saw the message about "libreoffice-style-galaxy". Could you please retest and ensure you shutdown the system when packages are being unpacked / installed?
After a discussion with Michael Vogt I tested this with unattended-upgrades version 0.92ubuntu1.4 from yakkety-updates and observed the shutdown blocked temporarily (message in plymouth about updates being installed) when I shutdown the system with unattended-upgrades running.
I was connected via ssh when running the unattended-upgrades and saw the following:
Preparing to unpack .../18- libreoffice- style-galaxy_ 1%3a5.2. 2-0ubuntu2. 1_all.deb ... style-galaxy (1:5.2. 2-0ubuntu2. 1) over (1:5.2.2-0ubuntu2) ...
Unpacking libreoffice-
Connection to clean-yakkety-amd64 closed by remote host.
Connection to clean-yakkety-amd64 closed.
In plymouth I also saw the message about "libreoffice- style-galaxy" . Could you please retest and ensure you shutdown the system when packages are being unpacked / installed?