I'm using Caffeine to keep Windows from auto-locking due to domain-enforced GPO settings. When taking a long break, I will manually switch off my external monitor, using the physical power button. However, Windows will switch on my laptop monitor instead (disable multi monitor mode).
Is there a simple way to put a black screensaver, on demand? Windows default screensaver settings obviously doesn't work in this case, because I'm using Caffeine and it will never get activated.