JTL Also I've tried dithering but don't think it affects external monitors, I'll have to try igfx since I think you can specify an external monitor. I wish they provided a binary, I'll have to install VS Studio to compile it.
ditherig didn't help me on my laptop (but I could see banding when it was running), so either dithering doesn't affect me, or Intel is doing something else to hurt my eyes. Supposedly Windows in the Anniversary Update might be doing dithering itself, maybe dithering is still happening even though I can see banding.
Going to also try this:
https://www.amazon.com/StarTech-com-External-Monitor-Graphics-USB32HD4K/dp/B00OD37KHG/ref=sr_1_1?ie=UTF8&qid=1522369985&sr=8-1&keywords=USB32HD4K&th=1
Will also try modesetting and live USB Ubuntu.