[worthless-trash]

I must be mixing up my details, but I did think it was one of the first gen cheese graters.

I did have it booting Linux before upstream officially supported it. I remember using patches from infradead

You may very well be correct, Maybe it wasn't EFI, however they absolutely did ship an update that broke my existing installs, until upstream linux shipped an update, so your memory aligns more than mine does.