Seahorse keeps GnuPG key unlocked when keyboard is locked

["Cason, Lee" <leecason cleviton com>]

Is there a way change Seahorse (or keyboard function) so that when the keyboard is locked, unlocked GnuPG keys are also locked? I'd like to avoid having to log out just to re-lock a key that has been unlocked. Sorry if this is a stupid question that reveals my lack of understanding of PGP internals.

OS: Linux Mint 17.1 Cinnamon 64-bit (v2.4.8)

Linux Kernel: 3.13.0-37

Nemo 2.4.5

Seahorse 3.10.2

Thanks,

Lee Cason

Fairfax, VA  USA