This is a Lemmy community created to discuss all things Libreboot. As you can tell, it's quite empty here, so please feel welcome to fill it up with your experiences of Libreboot.
I've created this community to do my part and help the migration from Reddit to Lemmy. Lemmy isn't perfect, but it's closer to Libreboot's spirit than Reddit is. That's what I think, anyway.
My understanding is that you simply won't be able to flash libreboot on a non-supported laptop. Bear in mind, 'supported' here actually means 'a machine that happens not to have Intel Management Engine'.
To put it differently, Libreboot's maintainer hasn't consciously chosen supported hardware. It's just that newer generations of Intel and AMD chips make it impossible to flash libreboot on them. For these machines, the closest you can get is flashing coreboot, which disables/ringfences the problematic, privacy-threatening firmware (Intel ME, in the case of Intel) but doesn't eliminate it. Also, coreboot isn't free software -- libreboot was created as an alternative that's truly free (as in freedom, not beer, as the saying goes).
This is also why libreboot-compatible laptops tend to be really old Thinkpads and Chromebooks from between 2008-2012ish. If you want a more modern laptop, then I'd suggest coreboot, with the main caveat that strictly speaking, coreboot doesn't comprehensively eliminate the privacy problem the way libreboot does, and that it's also not free software.
I was wondering why all the supported hardware were thinkpads from yesteryear. That makes sense about IME too.
My laptop is definitely too modern then, unfortunately.