On Fri, 20 Jan 2023 at 00:15, James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx> wrote: > > 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. > Nothing in particular comes to mind. Is this a mixed mode system?