Comment 17 for bug 1789650

I've never dug into the efibootmgr source code, so I don't know offhand where it's getting the BootCurrent variable, but /sys/firmware/efi/efivars/BootCurrent-8be4df61-93ca-11d2-aa0d-00e098032b8c is a plausible source. FWIW, on the deployed problem machine, /sys/firmware/efi/efivars/BootCurrent-8be4df61-93ca-11d2-aa0d-00e098032b8c does exist and contains plausible data. If you've got a custom deployment config you want me to run, I can do that; or I can give you access to our MAAS server and the trouble systems.