It worked! I had to uninstall all video drivers, cuda-dependent packages, and reinstall the video-nvidia-440xx package. I did so with Manjaro’s auto-install tool: https://wiki.manjaro.org/index.php?title=Manjaro_Settings_Manager#Hardware_Detection 79
I think the problem was installing the opencl-nvidia 1 package. This installs the 430xx nvidia drivers by default. I don’t remember when I did this, but it had to do with nvidia-docker, for one of my last projects.
Thanks for the tip!