This question already has an answer here:
Edit: Trying solution after solution found on these forums with the bootloader has apparently corrupted the bootloader. I missed pressing shift twice in a row and on the third attempt, the bios does not recognize a bootloader anymore. So it looks like I'm starting from scratch.
I am new to Ubuntu and I am using a 1440p & 1080p multi-monitor display setup. Using the default drivers (neuveau?), I am unable to get my display working because when I change my 1080p screen to be in portrait mode instead of the default landscape mode, my 1440p monitor goes black (It's a Crossover 27").
As a result, I assumed that the neuveau drivers won't cut it for my setup. So, I installed NVIDIA drivers for my GTX 680 using this guide: http://www.howopensource.com/2012/10/install-nvidia-geforce-driver-in-ubuntu-12-10-12-04-using-ppa/
After installation and reboot, both of my monitors are now black. I can hear the Ubuntu jingle at the log-in screen. Pressing CTRL+ALT+F1 results in a black screen with a flashing white underscore.
Using just one monitor procures the same results.
I am at a loss of where to go next.
Thanks for your help.
Edit: I decided to try running the following command (In recovery mode):
sudo apt-get purge nvidia-current
This did not resolve my issue. I still boot into a black screen.
2nd Edit: Things are getting stranger now. After attempting to uninstall the video drivers, I booted into recovery mode to try to update my system and reinstall them. After trying the networking option, Ubuntu froze there. So I did Cntrl+C and Ubuntu booted. My primary monitor was still black, but my secondary somehow worked. After logging in, my driver now says GTX 680.
So, I rebooted, and now I'm still back at the black screen on both monitors.