amd64/76136: [hang] system halts before reboot

[Andriy Gapon]

on 05/12/2010 23:40 Sebastian Chmielewski said the following:
> On Sun, 5 Dec 2010 09:41:33 GMT
> avg at FreeBSD.org wrote:
> 
>> Synopsis: [hang] system halts before reboot
>>
>> State-Changed-From-To: open->closed
>> State-Changed-By: avg
>> State-Changed-When: Sun Dec 5 09:34:16 UTC 2010
>> State-Changed-Why: 
>> I think that the problem reported in this PR is still
>> reported from time to time, but I am closing this PR anyway:
>> - it's very old and for FreeBSD 5.3
>> - no followups or feedback
> 
> I'm experiencing this issue on my FreeBSD 8.1 with Core 2 Duo T5500 in 64 bit mode. It happens when system was suspended at least 
> once before trying to shutdown.
> 
> Steps:
> - power on
> - use 'zzz' command to put machine in ACPI suspend
> - wake up
> - shutdown -h now
> - last message seen on console log is "stopping other cpus"
> Hang up doesn't happen when laptop wasn't suspended befoere trying to shutdown.

Will you be able to debug this?
I'd start with adding DDB support to kernel and trying to enter DDB when the
hang takes place.

Thanks!
-- 
Andriy Gapon