Re: 260.19.12 still not working on 10.10
seams like you made a mistake during installation. If the installation succeeds the nvidia driver and kernel module have exactly the same version.
to your questions:
no I don't have a SLI configuration and I don't think this even exists in Laptops
yes I can switch to console by ctrl+alt+1
no I can't switch cabels because my laptop just has a VGA and an HDMI out and my monitors don't have an HDMI in
apart from that did this setup work for years with the old driver so I see no point in changing it