FYI- My 2820 won't boot reliably headless without an HDMI dummy plug attached (such as http://www.amazon.com/CompuLab-fit-Headless-Display-Emulator/dp/B00FLZXGJ6), even with the latest BIOS. These seem to be hit or miss in a headless configuration, and not everyone has the HDMI boot failure issue, so you may luck out.
I sent an email to the list a few days ago about a board we have that has issues booting without an hdmi display attached, but I didn't get any responses.
We don't have a boot 'failure' per se (the board technically boots fine with no display), rather if there's no screen attached during boot then it completely disables video and never recognizes a screen attached later, ie; you have to reboot to get video back.
Do these 'dummy plugs' help solve issues like that? And/or is there a way to 'kickstart' the video back in to life without having to reboot?
