Making a Linux home server sleep on idle and wake on demand (2023)

Well done. But note: you can grab an ATX control board, or configure the RPi as a USB Gadget to wake the machine via power button or keyboard.

Note: If you're going to use an SBC _only_ for wake up signals, you might want to look into alternatives for the RPi such as the Radxa RockPi S [1]. My home server, for example, runs continuously at 7W, which beats many RPi models. Of course, a Pi to wake things doesn't need that much power and could be an older model, but even then, you'd still be burning "empty Watts".

Of course, the RockPi doesn't give you any KVM like functionality, though.

[1]: https://wiki.radxa.com/RockpiS