I used to have an Asus monitor at work that would freeze completely if I had a macbook plugged in when it woke from sleep. I had to always remember to first press some buttons to wake it up then plug in my laptop. If I forgot, I would have to unplug it from the wall, unplug my laptop (so it didn't just immediately freeze again), plug it in and let it boot up, then plug in my laptop.

That and a very poorly made Asus laptop left me with the impression that while they might build good motherboards, that quality didn't necessarily extend other products.