So I've recently installed Ubuntu as a secondary operating system on my computer alongside windows 8.1, and I've discovered that it refuses to boot up with my Nvidia 960 GPU installed. I've repeatedly installed and reinstalled the 349 driver by taking out the GPU and using the commands:
sudo add-apt-repository ppa:mamarley/nvidia
sudo apt-get update
sudo apt-get install nvidia-349
but every time I try to boot up ubuntu normally with the GPU installed I'm left with a black screen. I've been managing to boot up ubuntu using recovery mode, but I'm looking for a more permanent fix. Does anyone know what I'm doing wrong or what I can try?