Well, it seems you’re mhwd is having the same, or nearly the same, problem I had. The drriver seems to be installes correctly, according to inxi:
Try running:
mhwd -i video-nvidia
(I’m not sure what it does, but I think it enables the use of the driver in the kernel.)
Edit:
OR no. Just saw the version of the driver. My mistake. You’ll have to follow this guide for that driver.