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Date:      Tue, 3 Apr 2018 00:35:35 +0700
From:      Eugene Grosbein <eugen@grosbein.net>
To:        markk@knigma.org, freebsd-stable@freebsd.org
Subject:   Re: FreeBSD 10.4 kernel breaks on i7-7700 / PRIME H270M-PLUS
Message-ID:  <5AC269E7.6030100@grosbein.net>
In-Reply-To: <827319fc-b634-c0aa-063b-6e4a0ade8163@knigma.org>
References:  <f27aec4a-2b9d-4722-df7b-afb01b90f098@knigma.org> <5AC1C628.6030309@grosbein.net> <3c184bf8-8651-22a7-a040-8260b44647da@knigma.org> <5AC233B2.2050805@grosbein.net> <827319fc-b634-c0aa-063b-6e4a0ade8163@knigma.org>

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02.04.2018 23:41, Mark Knight пишет:
> On 02/04/2018 14:44, Eugene Grosbein wrote:
>> 3. Boot new kernel using nextboot(8) and see if it will crash instead of deadlock
>> and if so, fill the PR to Bugzilla.
> 
> Thanks again. Drat, no crash. The only difference was a few new errors during the boot - which I'm assuming are unrelated.

Add to /etc/sysctl.conf:

debug.kdb.break_to_debugger=1

Use such debugging kernel to drop to the debugger when deadlock occurs
using Ctr-Alt-ESC and type "call doadump", you should get crashdump anyway.
Then use "reboot" or just power cycle to get crashdump stored to /var/crash.

Then fill a PR and reply with the number.




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