there is an addon "master password timeout" that does exactly what you want.
-- Master password should expire after some minutes of inactivity https://bugs.launchpad.net/bugs/407615 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
