I recently installed Loki on my machine. I was running two monitors on an AMD FirePro 7000. I installed an Nvidia GTX 970, and only one monitor was being recognized. I tried various combinations of cables (HDMI, DisplayPort, and DVI). After trying the DVI cable, the monitor was showing garbage. Now I have no way to reach the greet screen. Any combination of cable boots to a screen full of vertical lines (http://imgur.com/2Y8vMl6) How might I be able to reinstall my graphics drivers? [EDIT] solved