I have a MacBook Pro (the older one with a cd-rom), running OSX 10.9.1 and sometimes my Mac will sleep and never wake up. Usually this happens when I "sleep" the mac, unplug it from the Thunderbolt, then try to wake the Mac up at my other office with a different Thunderbolt. The screen will never come back. Tried safe restart, multiple combinations of plugged/unplugged to Thunderbolt and/or Power Supply, and open/shutting the screen.
It takes a very long time and many attempts to bring the screen back, usually by trying a 3rd Thunderbolt screen. There is clearly some sort of display issue, but the parameters are known. Any ideas what the precise problem is and how to fix it?