In that case, I would suggest you try to install the proprietary nvidia driver.
Especially GNOME3 is a bit picky with the drivers, as it absolutely requires OpenGL support.
Try to add “nomodeset” to the boot options (see below) as a first step, does it work then?
When the screen is just black with a mouse pointer, try to press Ctrl+Alt+Backspace twice, do you get to a login screen?
I don’t have a network configured on it, except the internet.
Well, but the Internet is a network connnection, isn’t it?
How do you connect to the Internet? (via cable or wireless f.e.)
If it’s a cable connection, it should work out of the box even in text mode, that would make it easier to install the driver.
In that case, add “3” to the boot options to boot to text mode. If it is grub1 you can just enter “3” at the boot menu. For grub2 you have to press the ‘e’ key, append “3” to the end of the line starting with “linux” and press ‘F10’ to boot.
Then log in with the username root and your normal password.
Run yast, select Network Settings->Network Devices, switch to ifup in “Global Options” and setup your network card if necessary.
Select “Software Repositories”, “Add”, “Community Repositories”, and add the NVidia repository.
Then enter “Software Management”, type “nvidia” into the search field, and install the packages x11-video-nvidiaG02, nvidia-gfxG02-kmp-desktop, and nvidia-computeG02 (the latter two should be selected automatically)
Then the system would hopefully boot.
If that doesn’t help, or you don’t have a Internet connection in text mode (you could try to set it up with yast though), I would suggest to try one of the following:
- Install 13.1 instead, the newer kernel and nouveau driver might work better on your system
- Re-install 12.3, but choose something else than GNOME. Other DEs might start just fine without any additional driver.
You can always add GNOME later on when your system is up and running, preferaby with the nvidia driver.