I'm pretty sure this is the source of the problem, software-properties looks at Apt configuration options, which are the following in a fresh install of Xenial.
bdmurray@clean-xenial-amd64:~$ grep -r "APT::Periodic" /etc/apt/* /etc/apt/apt.conf.d/10periodic:APT::Periodic::Update-Package-Lists "1"; /etc/apt/apt.conf.d/10periodic:APT::Periodic::Download-Upgradeable-Packages "0"; /etc/apt/apt.conf.d/10periodic:APT::Periodic::AutocleanInterval "0"; /etc/apt/apt.conf.d/20auto-upgrades:APT::Periodic::Update-Package-Lists "1"; /etc/apt/apt.conf.d/20auto-upgrades:APT::Periodic::Unattended-Upgrade "1"; So we have autodownload set to 0, and unattended set to 1. Looking at the code in SoftwareProperties.py we see: 147 if apt_pkg.config.find_i(softwareproperties.CONF_MAP["autoupdate"]) > 0: 148 # Autodownload 149 if apt_pkg.config.find_i(softwareproperties.CONF_MAP["unattended"]) == 1\ 150 and apt_pkg.config.find_i(softwareproperties.CONF_MAP["autodownload"]) == 1 : 151 return softwareproperties.UPDATE_INST_SEC 152 elif apt_pkg.config.find_i(softwareproperties.CONF_MAP["autodownload"]) == 1 and \ 153 apt_pkg.config.find_i(softwareproperties.CONF_MAP["unattended"]) == 0: 154 return softwareproperties.UPDATE_DOWNLOAD 155 elif apt_pkg.config.find_i(softwareproperties.CONF_MAP["unattended"]) == 0 and \ 156 apt_pkg.config.find_i(softwareproperties.CONF_MAP["autodownload"]) == 0: 157 return softwareproperties.UPDATE_NOTIFY 158 else: 159 return None So somebody's created a situation we hadn't planned on. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1554099 Title: Changing what action for security updates unusable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/software-properties/+bug/1554099/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
