1. Unable to disable auto-switch sources
2. When the computer is left for any amount of time, the XG279Q goes into what I can only think of as 'Deep Sleep mode', the only way to get it to show up in Windows again is to remove the power source and plug it back in.
What is going on Asus? That's a lot of money dropped for something so buggy.
And before you ask, yes. Every single sleep option has been disabled in Windows/environment power settings.