I'm running Ubuntu 18.04 with an NVIDIA RTX 2080, Kernel 4.15. I updated my packages, then manually switched the proprietary drivers from 410 to 418 (*) using the GUI switcher for proprietary drivers. Now I'm getting a black screen after login and nothing happens, even cannot switch to console using Ctrl-Alt-F1.
How can I switch back to 410 (or disable the driver) using the command line? ubuntu-drivers only shows a list, but for no reason doesn't allow to actually choose one of the drivers.
Or does anybody know the problem and know how to solve it?
(*) I've no idea if those came from the nvidia ppa or with CUDA or whatever in the past