Well ok that was my first thought,too (boolean) so my first tests were misleading then. I tested a little bit more and find something maybe more useful.
When using Ubuntu 16.04.2 fresh installed and I set in /etc/apt/apt.conf.d/50unattended-upgrades: Unattended-Upgrade::InstallOnShutdown "true"; it seems to have no effect. Upgrades are there but they do not get installed. I get no plymouth message on shutdown. Same when set to "True". When I change /usr/share/unattended-upgrades/unattended-upgrade- shutdown: (line 120 again) # check if we need to run unattended-upgrades on shutdown and if so, # run it p = None apt_pkg.init_config() before << if apt_pkg.config.find_b("Unattended-Upgrade::InstallOnShutdown", False): after >> if apt_pkg.config.find_b("Unattended-Upgrade::InstallOnShutdown", False) == True: env = copy.copy(os.environ) env["UNATTENDED_UPGRADES_FORCE_INSTALL_ON_SHUTDOWN"] = "1" Then it seems to work like expected. Now when i set: "Unattended-Upgrade::InstallOnShutdown "true"; in /etc/apt/apt.conf.d/50unattended-upgrades it starts upgrading on shutdown (I see the plymouth message "Unattended Upgrades..."). When I set it to "false" or just outcomment the whole line it do nothing on shutdown. So exact the behavior I expect. Well I'm not a python expert but it seems to me that the <if True> thing works not as it should or maybe has changed in python3 some how? It may affect all other statements as well then (like MailOnlyOnError etc) but I haven't tested them yet... With the above patch it works for me as it should. At least for the shutdown setting. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1661611 Title: apt/unattended-upgrades stalls shutdown To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unattended-upgrades/+bug/1661611/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs