Hi, I have committed changes on CUPS to GIT, adding features for running the CUPS daemon on-demand, once to trigger cupsd via Upstart's socket bridge and second, to automatically shut down CUPS when it gets idle (no jobs, no shared printers). See also https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1276713 https://blueprints.launchpad.net/ubuntu/+spec/client-1305-printing-stack-with-mobile-in-mind Thanks in advance Till