Black screen after BIOS update
I messed up.
Yesterday after deciding to switch from the mainline generic kernel to the upboard one I rebooted my UP. Of course things got very dirty very quickly.
I ended up having to liveboot and revert what I've done via chroot. Mainline did it's magic, everything was back to normal.
Being in a tinkering mood, I wanted to test that shiny upboard kernel though. You know, because reasons....
So I thought to myself: "Hey! Maybe the upboard kernel isn't bad after all! Maybe an formware update will fix this!" I should've stopped at that point.
Oh boy. I was in for a ride.
So I followed that article:
Formatted a thumbdrive with FAT32, copied over the files, checked sha256sums of everything.
Sure enough, they matched with what I had downloaded.
So I plugged it in, popped an EFI shell and ran
It started the normal sequence of reading, erasing, verifying. After a couple of minutes verifying a yellow text popped up for a split second, then the UP board rebooted. The screen stayed black.
For half an hour.
I've cut the power, went for a coffee, still: black screen. I can't change the NumLock or Caps state of the attached USB keyboard either. This pretty much tells me the board does not POST, or hangs very early on.