Comment 6 for bug 538071

a better temporary fix for now until the support files are moved into /lib would be to just manually copy the modprobe blacklist to /etc/modprobe.d instead with something like

sudo cp /usr/lib/nvidia-current/modprobe.conf /etc/modprobe.d/nvidia.conf

the problem is that /etc/modprobe.d/nvidia-graphics-drivers.conf is a symlink to a device thats not mounted when it needs to be in your situation and Alberto is going to move it to /lib at some point to work around this.