Yep, typical nVidia as usual.
One advice though: If you don't do gaming or CUDA based stuff, don't use the proprietary nVidia driver. It is faster but qualitatively worse than the open Nouveau driver.
That said, follow this link for possible solutions:
More links and solutions:
https://ubuntu-mate.community/t/black-screen-issues
https://ubuntu-mate.community/t/black-screen-after-boot-on-18-04-with-nvidia
https://ubuntu-mate.community/t/black-screen-after-changing-graphic-card
https://ubuntu-mate.community/t/black-screen-missing-login-screen
https://ubuntu-mate.community/t/black-screen-no-login-prompt-after-latest-nvidia-update
https://ubuntu-mate.community/t/get-black-screen-lightdm-cannot-start