your Linux crashed. Ctrl+Alt+Backspace does nothing, nor do the F-keys. You know you shouldn’t have installed that bad driver, but you did it anyway. Here is how you do a safe reboots of the system avoiding the power button.
Having only the services you need running will make your system faster, more stable and secure. So the first thing you need to do after installing a Linux distribution is to manually edit the list of enabled services.