My use case is multiple users on a single machine. User1 logs in, nvidia-settings works perfectly fine, User2 logs in and is unable to access nvidia-settings. If the User2 logs in first, the inverse happens, User2 is able to access nvidia-settings, User1 is not able to access settings.
They do seem to be different displays, but I’m not sure what to do with this information. In this case, user axium was logged in first and is functional, user axium-w logged in second and doesn’t have access to nividia-settings.