After trying to install a new driver for my graphics card GeForce MX250 from the official Nvidia website (which was working until I turned my computer off), I can't get my computer to start anymore. After accessing the login screen and login in to my user account, the screen turns black.
I've read that I should remove the new driver and install one of the official package manager, but I just can't open a terminal so I'm somewhat lost.
I tried every possible combination of Ctrl+alt+F1-F12. But no terminal is appearing. I can't get out of the GUI. It's either that or a blank screen.
I also tried to access some kind of terminal from the gnu grub version 2.02 page which I can access during booting. I'm sorry, I don't really know if this is supposed to work anyway, but as possible boot options, I only got Ubuntu, which brought me back to the login screen.
I really hope someone can help me!