Settings won't save, monitor arrangement reverts back. Running two Quadro P400 on Linux.

I’m trying to run two NVIDIA Quadro P400 graphics cards in Linux. I’ve tried various flavors of Linux but all were unsuccessful. I can get all 6 monitors to work, I just can’t get the


tool to save the arrangement of the monitors. Every time I reboot, the arrangement reverts back to the default arrangement. I’d like to stack 3 monitors on top of 3 other monitors.
I have an ASUS Z270 motherboard and 6 identical ASUS monitors.

You have to have an autostart entry running
nvidia-settings --load-config-only
to load the saved config on boot.