SirFalcon wrote:I am having a similar problem. I installed a GTX 650 Ti and tried installing the driver from nvidia. I got an error due to X server running. I tried ctrl+alt+f1 then logging in as root. I tried telinit 3 and 2 but X was still there and the driver would not install. I tried tellinit 1 and the driver gave me a series of warning messages and then installed. Now Linux will not boot. It hangs on a log in screen and if I type in my name and password it checks the battery then loops back to log in again. Linux will boot if I run recovery mode option from the boot menu, then select resume.
it seems your nvidia installation failed totally. What you can try:
1. sudo rm /etc/X11/xorg.conf (just in case the installation routine created it)
switch to f1
sudo killall mdm (if mdm is your login manager)
cd <where your nvidia driver is>
sudo sh ./Your driver.run
If (!) no errors displayed: sudo reboot