I have a debian server (headless) and I need to plug a screen into it for a few days to do some work on it. Thing is, when I plug the screen into the server, there is no video output. How do I get debian to start the video output via SSH?
Often there is screen save software running. In this case, the screen should come to life once you hit a key on the keyboard. This requires plugging in a keyboard. Changing the screen saver options should work as well.
If you want X output on the screen, it may be better to use remote access like vnc-server or xrdp to get output on a remote screen.