Here is the soultion for systems that run systemd-boot as boot manager:
You would need to fire up a terminal (e.g. Konsole) and edit the file /etc/kernel/cmdline with your favourite text editor like this:
sudo nano /etc/kernel/cmdline
There you should see a single line where you append the parameter
nvidia_drm.fbdev=1
Also make sure that the parameter
nvidia_drm.modeset=1
is present somewhere in this line. Otherwise append it too.
If using nano as your text editor, just hit CTRL+X after editing the line and confirm with y and Enter that you would like to save the file.
After that, you can upgrade your system like normal and after a reboot everything should be up and running. 