How to boot Macbook Pro when in closed clamshell mode without the windows getting resized I have a mid 2012 MacBook Pro that I use an external 1440p monitor/keyboard/mouse with.

Another question shows it's not possible to boot it without opening the lid. When I do this, all of my windows resize/move to fit the 900p internal display, messing up my work environment every time I bring my computer from sleep.

Is there anyway around this?
With my 2007 MBP I can get it out of sleep by clicking a mouse button or key on my external keyboard with the lid closed. No problem. 

On a cold boot, I press the power button and then close the lid as fast as I can, and then it boots up on the external monitor with no ill effects.

Should work that way for any MBP!