[CentOS] CentOS 7.2, nouveau won't go away

Hi, folks,

Fully updated 7.2 system. I installed the correct proprietary NVidia driver (the user's expensive proprietary visualization software won't run with nouveau), I've put nouveau.modeset=0 rd.driver.blacklist=nouveau on the kernel line for grub2, and even yum removed the nouveau driver and built a new initrd... which won't boot, it seems to start and than does nothing, with a black screen, and this is just while booting, before it goes to graphical mode.

If I boot the as-built current initramfs, it loads nouveau, though one of the modules listed if I do lsmod | grep nou shows nvidia, in addition to nouveau.

So, in 7, what do I have to do to make nouveau go away? Is it as simple as creating an /etc/X11/xorg.conf, or...?

mark