Here the logs asked by jgdx For what it's worth, running system-image-cli somehow unblocked the gui, it now offers again to install the update (as it is already downloaded) :)
** Attachment added: "logs.tar" https://bugs.launchpad.net/ubuntu/+source/ubuntu-system-settings/+bug/1419803/+attachment/4730763/+files/logs.tar -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1419803 Title: Update download would not resume after lost and regained network connection To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1419803/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
