I've got a Rainbow Bridge SDV I mostly use for TPM work, and I haven't updated it in a while. Today I found that the recent 6.2-rc4 kernel won't boot and won't emit any kernel messages signalling a failure somewhere in the handoff code. I did put some EFI boot stub prints in and verified it gets all the way to exit_boot_services before the problem, so it smells like it fails initializing the EFI console for runtime. I've also verified that v6.1 release works just fine, so it looks like something that went into EFI in the recent merge window. I'm starting to bisect now, but thought I'd ask in case anyone else has already debugged this. James