On Ubuntu I was missing a cursor on one monitor, and my cursor was misplaced on another (as in it would display in a different location than where it would click). Both of those monitors would get around 3 frames per second.

My solution has been to never boot into Linux again. Maybe I’ll order the proper combination of cables so that I don’t need the adapter. Can you use all four ports of an Nvidia card? I seem to remember they’d only allow three ports despite supporting up to four monitors.