Thanks for the recommendation, I've just begun looking into a multi-monitor arm myself to free up some valuable desktop space. My 34" UltraWide and my 24" 16:10 are a little....big when both in landscape.
@%&# I wish I had seen this first! The EDID trick did nothing for me. Never had a problem with my nvidia cards, but I switched over to a 390x and suddenly had the problem. I still have this as my 2nd monitor.