[ref]MaLd0n[/ref],
you're awesome, thanks. That cleared it up. I do still get some strange pixelation on the login screen, but dual monitors are working great!
Added in 2 minutes 22 seconds:
[ref]aacase[/ref], https://Olarila.com/files/Utils/nvidia-update.command.zip
Thanks. I ran that from the Files folder before I sent the dump. Didn't seem to help, sadly.