I’m kindly asking for your help: I’ve been using Ubuntu on my Asus laptop for more than a year, which has an i3 4005u processor, and a Geforce 840M video card. I had to reinstall it, and since my video card is not recognized (by the very same system which is strange), in Additional Drivers it says Nvidia corporation - unknown. If I install any driver other than Nouveau, after booting the login screen is black (the laptop monitor is off), but I can hear the welcome screen sound. If I say “sudo apt-get remove --purge nvidia*” in tty and reboot, it’s working fine. Since the previous system was the exact same, with the same updated state, I don’t know what went wrong. With Windows 10, the video card is working fine.
EDIT: I have tried the .sh installer as well, but with the same result in the end. I don’t know what logs to look at, because I’m more of a linux user than expert, please also help with that.
Thank you in advance!