So I've been trying to fix this problem all day. I'm trying to use my TV as an extension of my laptop display through HDMI, but everytime I try to configure the settings to do extended display the resolution goes wacky and it becomes very hard to navigate applications. When display is set to mirrored everything works perfectly fine though. I've only gotten extended display to work once and never agin. Not sure what's wrong. I updated to the latest nvidia drivers. Installed arandr and xrandr. So far nothing has helped.
My laptop is the MSI GS63VR running with a 1060 in it
EDIT: Not sure if this picture helps, but when I mirror displays this page fits on one screen, when I extend displays it stretches across both