I can't seem to pinpoint a specific cause for this, but sometimes when I wake my MBP the external screen gets fuzzy, like a TV with no reception. If I sleep the display again (with hot corners) and wake it up again it's fine. Anyone know how to fix this? This is a repost from another forum and the same thing is happening to me. It seems to only do this with Acer monitors as my Samsung worked fine? Does anyone know a fix to prevent this from happening other than replugging the HDMI from my mac?