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Optimus laptop, how to disable Nvidia card

I have a laptop with Optimus technology and want to disable the discrete Nvidia graphics adapter, as I am not using many 3D accelerated applications and it just wastes battery. I tried to follow several tutorials, which all asked me to install bbswitch (which I did) and run "modprobe -r nouveau". When I do this, I get the error message "FATAL: Nouveau currently in use" or similar. I also tried to add a line "blacklist nouveau" to /etc/modprobe.d/blacklist and ran "dracut --force" to no avail. Does anyone know of a way to disable Nvidia in Fedora 19?