Sorry if these questions are dumb... Just got my 2011 15" MBP and a 27" ACD to go with it. Very Nice! Can I put the ACD to sleep and keep using MBP screen w/out unplugging anything? How do I turn off ACD while MBP is running? By simply pulling out mini display cable? It seems to work, but is it safe over time, or should I shut down/sleep MBP first? So if I'm ready to grab MBP and go, just simply unplug cables or shut down first? Thanks for your time.