Re: Mixed emotions....
I actually have the "black screen" problem, too - but with a 2012 MacMini connected to a 30" HP LP 3065 display via a TB-to-DL-DVI adapter (it's a very old display, probably ten years old, got it as a hand-me-down from my boss when he bought a new one).
It happens very rarely, though.
Sometimes, unplugging the adapter (sometimes a few times) does work, sometimes I reboot.