I can reproduce it on my machine, but this seems to be a bug in ubuntu- system-service, which is the responsible for writing the proxy settings in /etc/apt/apt.conf. g-c-c only calls it via DBus, so it's clearly a bug there?
** Package changed: gnome-control-center (Ubuntu) => ubuntu-system- service (Ubuntu) ** Changed in: ubuntu-system-service (Ubuntu) Assignee: Rodrigo Moya (rodrigo-moya) => (unassigned) -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/877088 Title: Network proxy setting does not set apt.conf from the second time To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-system-service/+bug/877088/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs