Having issues getting dual screens set up. My existing setup was:
Acer x123w monitor connected via DVI
Nvidia 9800GT using proprietary driver.
I've added an old TV screen via HDMI
But, I can't seem to get it to work, and now I've made matters worse

Now system settings (kde) doesn't even have two monitors listed, neither does nvidia-settings. I'm unsure where to go from here.
TIA