I have a Nintendo Switch, connected to 4:3 LCD computer monitor (GNR TS702) via a DVI-D input and a cable. The picture displays fine, and fills the whole screen at 1280 x 1024, which I imagine means the Switch is outputting 1080p. However the Switch is sending out a widescreen image, which then looks stretched vertically on my screen. On a Wii / WiiU, you could change the settings on the device to match the screen ratio:
However, I cannot find any such setting on the Switch.
Does the switch try to ask the screen what ratio / size it is, or does it just not care and leave the monitor / TV to set itself appropriately?