The only way to stop jovie is to pause it. If you disable it (either general settings or secondary click/configure jovie - general - click on enable text-to-speech system to disable it) it will come back on every minute to tell you the time
im running up-to-date jessie -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org