I've spent some time working on the randr dialog rotation as per
http://trac.enlightenment.org/e/ticket/1880. The attached patch fixes the
snapping and map application but also exposes some weirdness where, when
_e_smart_monitor_rotate_snap() is called during _e_smart_cb_rotate_stop(),
the monitor snaps into the wrong rotation and starts flipping out. I spent
some time debugging it without any luck, so I'm posting this patch for
someone else to try out.
Additionally, rotating after a resize causes the monitor aspect ratio to
break. Furthermore, it's possible to grab the rotate corner and drag in
such a way that the monitor stand starts dancing around in the
layout--possibly an easter egg?