I'm currently running an x64 v11 nightly but I've come across this since, forever.
If my LE system crashes or needs a reboot and the home theatre receiver is not turned on, the LE system does not know what resolution to set the output. Since it does not know what resolution to set, it sets no resolution. Many times have I come to fire everything up and I am presented with a blue screen as there is no signal coming into the Onkyo receiver. It forces me to SSH in and re-boot the system when the receiver is turned on so that the display comes back up again.
I'm hoping there might be a way that I can force the system to output a specific resolution within the LE config somewhere. I've already whitelisted resolutions in Kodi but I suspect the problem starts before Kodi gets started up.