There was a lot of intertwined behavior around VT switches and suspend/resume that I tried to untangle for the 465 series. All of it hinges off of the NVreg_PreserveVideoMemory=1 module parameter, which is still disabled by default in most cases. The suspend/hibernate/resume systemd units are required for the video memory preservation to function, which is why I made an effort to make the installer set those up automatically. If you’re using a PPA or other distribution packages, you’ll need to check with them to determine whether those systemd services are installed or enabled by default.
So the current state of things in 465.19.01 is that if you use the .run installer on a systemd distro, the only thing you’re supposed to need to do manually is enable NVreg_PreserveVideoMemory=1.