I'm having the same problem using the nvidia-331.38-updates driver. I followed your workaround on the BIOS, but the problems is still there.
I see a purple border around one of my screens, and then it's just blank with a blinking cursor. I don't have encryption, so I just went straight into the log-in window.
Before installing the nvidia propietary drivers, the log-in screen was great, where I could see the Ubuntu log on all my screens.
I'm having the same problem using the nvidia- 331.38- updates driver. I followed your workaround on the BIOS, but the problems is still there.
I see a purple border around one of my screens, and then it's just blank with a blinking cursor. I don't have encryption, so I just went straight into the log-in window.
Before installing the nvidia propietary drivers, the log-in screen was great, where I could see the Ubuntu log on all my screens.