Ubuntu 16.04 black screen when shutdown / hibernate / restart

From this stack overflow question: Sorry to repost but I would really file this under a significant bug as nothing is working.
https://askubuntu.com/questions/906522/ubuntu-16-04-black-screen-when-shutdown-hibernate-restart

Basically, I just clean installed Ubuntu 16, and I can't shut down the laptop. I

Now, when I press shutdown, it goes into a black screen with a terminal like "_" at the top left corner, and it's frozen. This seems different from the other stack overflow threads. I have to hard reset to shut it down.

Same goes if I close the lid, or press restart. `sudo shutdown` isnt working either.

Seen the below few threads, none of them really help.

https://askubuntu.com/questions/764568/ubuntu-16-04-hangs-on-shutdown-restart <-- Interested in the second solution but I cant seem to locate and install just that update hes talking about?

https://askubuntu.com/questions/774540/ubuntu-16-04-black-screen-when-waking-from-suspend

https://askubuntu.com/questions/785157/ubuntu-16-04-black-screen-after-suspend

Tried nearly all the grub based and other solutions there, but nothing is working.

Specs:
Core i7 7700HQ
Nvidia 1060GTX (Currently disabled - running on intel graphics)
Linux kernel: 4.8.0-46-generic

Would appreciate help, Thank you! :)

EDIT:

Tried https://askubuntu.com/questions/508029/ubuntu-14-04-stuck-on-shutdown as well but still nothing is working.