How does the Raspberry Pi determine whether it should go into headless mode? And how has this changed from RPi 3B+ (Stretch) to RPi4 (Bookworm)?
There's a wire in the HDMI cable for this purpose plus the Pi tries to read the EDID info from the display.
It's also a software change not a hardware one. Newer OS and drivers behave differently to the old ones when no monitor is connected.
Statistics: Posted by thagrol — Wed Mar 27, 2024 8:31 pm