xrandr gives useful information on some cards. You can also try "nvidia-settings -q all" on nVidia boards (or try setting DynamicTwinView to false, see the nVidia docs).
As for the ambient lighting, I don't think it will once you use black electrical tape to attach the detector. TVs also usually aren't installed where subject to really bright light (e.g., direct sunlight) because then you can't see the screen.
As for the ambient lighting, I don't think it will once you use black electrical tape to attach the detector. TVs also usually aren't installed where subject to really bright light (e.g., direct sunlight) because then you can't see the screen.