Last time I had NVIDIA on my daily driver the proprietary driver would work fine until the next kernel update then would boot blackscreen. The only way to fix it was to boot into single user mode purge the driver all of its configuration file, and the NVIDIA configuration utility install the open source driver reboot then reinstall the proprietary driver then it would work fine until the next time either the driver or the kernel updated at which point I would have to do it all over again.
