Intermittent EFI boot issue?
gjb at FreeBSD.org
Mon May 30 03:12:04 UTC 2016
On Sun, May 29, 2016 at 11:05:01PM -0400, Jason Hunt wrote:
> Intermittently after building world/kernel and installing kernel, upon
> reboot I sometimes get stuck at:
> >> FreeBSD EFI boot block
> Loader path: /boot/loader.efi
> Initializing modules: ZFS UFS
> Probing 35 block devices ... done
> ZFS found the following pools: zroot
> UFS found no partitions
> Consoles: EFI console
> And that's it.
> Often times it's fixed by rebooting, but sometimes it takes numerous
> attempts. Patience and cold boot vs warm boot doesn't make a difference
> and unfortunately there doesn't seem to be any pattern as to how it fixes
> itself. Eventually the full boot screen appears and I can get in to single
> user mode to continue installing world.
> I've only been following current for a couple of months, so I can't say if
> this is a new problem, but it's happened most (but not every) times I've
> rebuilt the system. Normal day-to-day rebooting doesn't give me any
> issues; only when rebuilding.
> Do I potentially have a buggy EFI firmware (motherboard is an ASUS P8B75-M
> with latest firmware), or could it be a FreeBSD issue? I'm not even sure
> how to try diagnosing this or what information would be helpful?
> Any suggestions are appreciated.
I've heard of an issue I've hit only a few times, without being able to
reproduce it reliably.
When the machine passes POST, could you hold down the spacebar (or other
Ideally, it will drop you to the loader prompt and/or ask you what you
want to do. Typing 'boot' and hitting '[enter]', if the working theory
is correct, should work.
If not, we have more than one issue here.
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