Translations:Nouveau/14/en
From Gentoo Wiki
To prevent this (without uninstalling the x11-drivers/nvidia-drivers package), simply remove/move/rename the udev file /lib/udev/rules.d/99-nvidia.rules so that is no longer taken up by udev (see Advanced Configuration of udev). Note that the next time nvidia-drivers is updated, that file will be re-installed, so consider unmerging nvidia-drivers.