[Users] Full-size display Windows vs Fedora 20 guests

Hi, When I select View/Full Screen on a VM running a Windows guest, the display resolution automatically adjusts to fit the new canvas. However, when I do this on a VM running Fedora 20, it doesn't. Nor do I know how to query the new canvas size so that I can issue a manual xrandr command to fit it (without doing an ssh into the system and somehow finagling xwininfo to give me the size). In the guest I am running spice-vdagent-0.15.0-1, and restarting it has no effect. Shouldn't it be the one responsible for display optimization? -Bob