I am using dual monitors with my laptop. I used nvidia's configuration tool (nvidia-xconfig) to detect the second monitor (via HDMI) and setup twinview, no problems. Now, if I try to boot up without that monitor, I'm having a strange issue.
On boot, everything is normal. Then, I get an error on the left side of the screen saying checks failed for a large variety of screen resolutions and frequencies. In addition, my mouse only moves in a small column on the left side of the screen, and clicks are registered, quite strangely, on the right side of the screen. I can't click on Unity at all. However, the keyboard works, so I can get into the terminal with the Windows key. I tried getting into nvidia-xconfig, but the GUI did not come up. I tried to manually edit /etc/X11/xorg.conf, but I don't know what to change.
Does anyone know of a way I can reset my display settings through the command line or through manually editing xorg.conf? Thanks!