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Subject: Re:
 FreeBSD-14.0-CURRENT-amd64-20210408-15dc713ceb5-245885-memstick.img fails to
 boot on Haswell-based laptop.
To: freebsd-current@freebsd.org
References: <88fac685-ee3d-f9d6-d81d-1d8b5f3c7762@FreeBSD.org>
 <YHiIwDYKG/c2txAV@heemeyer.club>
 <37dab5a0-3253-ee2f-c33f-6095016be134@FreeBSD.org>
From: Lev Serebryakov <lev@FreeBSD.org>
Organization: FreeBSD
Message-ID: <ed778881-d538-9930-f1e2-7297f31f51c3@FreeBSD.org>
Date: Sat, 24 Apr 2021 17:19:57 +0300
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On 15.04.2021 22:19, Lev Serebryakov wrote:

>>> calltrap()
>>> --- trap 0x9
>>> run_interrupt_driven_config_hooks()
>>> boot_run_interrupt_driven_config_hooks()
>>> mi_startup()
>>>
>>>    It is 100% reproducible, and I cannot issue commands to kernel debugger, keyboard is dead.
>>>
>>>    Enabling verbose boot helps, with verbose boot it boots to installer.
>>>
>>>    Looks like some race condition.
>>>
>>>    Is it known problem?
>>
>> try to boot verbose
> 
> It is funny, but boot-verbose helps on battery and doesn't help with AC. I think, it is because with AC plugged in CPU is set to "performance" mode and delay from printing verbose information is not enough!

  Same panic with much more recent kernel, again, only if AC power is connected...

-- 
// Lev Serebryakov