Re: r316677:EFI boot failure: Can't load kernel

> On 12. apr 2017, at 22:48, Chris H <bsd-lists_at_bsdforge.com> wrote:
> 
> On Tue, 11 Apr 2017 23:42:52 +0900 (JST) Masachika ISHIZUKA
> <ish_at_amail.plala.or.jp <mailto:ish_at_amail.plala.or.jp>> wrote
> 
>>> replaced /boot/loader with /boot/loader.old (which was from end of
>>> March)
>>> 
>>> copied /boot/loader.efi from the r315864 snapshot USB image
>>> into /boot/loader.efi of the broken systems.
>>> 
>>> Aprt from the fact that I don't know which one is broken, the boxes are
>>> booting again.
>>> 
>>> Conclusion: UEFI loader is broken!
>> 
>>  Hi.
>> 
>>  I'm using dell xps12 9q33 (core i7-4500U) with an internal SSD.
>>  As reporting Bug 218473, I cannot boot /boot/loader.efi after
>> r316585.  Replacing only loader.efi before r316584, I can boot
>> again.
> 
> I was going to also report similar findings.
> After reporting the problem && submitting additional info to help
> diagnose the situation.
> I found that the most efficient way to overcome the issue, was to
> move loader.efi aside, and copy loader.efi from the install DVD.
> I've since lowered the priority of (u)efi in the BIOS, taking
> legacy as the higher priority. Because I had additional problems
> with vt. In the end, I find I have no issues simply booting to
> syscons(4) -- Xorg even works more harmoniously with it. :-)
> 

I believe we did identify the problem, the fix is posted as https://reviews.freebsd.org/D10381 <https://reviews.freebsd.org/D10381> please review, if you can confirm the fix by testing, it would also be really helpful - the issue is, the problem appears to be system specific and not always manifesting itself.

thanks,
toomas