I have gotten Wake On LAN (WOL) setup and working. However my machine is a Ubuntu machine using full disk LUKS encryption which means when booting it up, it requires a password/passphrase to unlock the machine before it boots into Ubuntu. The WOL systemD service I created will always make sure WOl is enabled for the next time the machine reboots, however if I reboot the machine and fail to unlock the device on the full disk encryption menu and the machine shut down, WOL will not be enabled which means WOL is not going to work to turn on the machine again.
Is there a way to enable WOL on the system full disk LUKs encryption lock screen?
Use dropbear? Dropbear is an ssh server, but it is a minimal one which can be embedded in the initramfs image. I think in ubuntu the package is called dropbear-initramfs. It is used for decrypting in early boot. There are great in structions for all this if you search.
The solution would then look like: wol, ssh into it, you are prompted passphrase, once entered you are thrown out, computer continues boot, you are done.
This is what I’ve been doing for a few years now.
I do use dropbear-initramfs. However the issue if I power off or the power goes out while I am unlocking the computer, I will be unable to reboot the computer using WOL. Is there something like dropbear-initramfs but instead of it being a SSH server for the LUKS lockscreen, it is a WOL enabler?
Sorry, so your motherboard/network card resets the WOL feature on a second reboot? Or what is the problem?
here is a guide you might be able to get some ideas from on how to set it up
you will not be able to get the WOL to work as long as you require a password to boot. if you need full disk encryption, look into storing the encryption password in TPM, enable secure boot and password protect bios/system setup with a locked boot order.
as long as your system requires input from you to start, it will always stop at the luks unlock step, unless you find another place to store the keys to allow unlocking without user input.
it could work if the computer suspended instead of powering off, but then it will fail again in a case of power loss.
hope this helps a bit, and good luck. seems like a fun project.