From owner-freebsd-amd64@FreeBSD.ORG  Wed Apr 13 07:44:39 2005
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Date: Wed, 13 Apr 2005 09:44:35 +0200
From: Eirik =?ISO-8859-1?B?2A==?=verby <ltning@anduin.net>
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Subject: Re: Mysterious hangs
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Sorry, this was meant for the amd64 list.
Got another report for this list. Confused the addresses.

On 13-04-05 07:28, "Eirik =D8verby" <ltning@anduin.net> wrote:

> Hi,
>=20
> For some time I've been seeing infrequent and seemingly random hangs on m=
y
> dual opteron system. Motherboard is Tyan K8S Pro. Until now I thought it =
was a
> "hard" hang, but I've got serial console hooked up and BREAK_TO_DEBUGGER,=
 DDB
> and KDB in the kernel, and when sending a break through telnet I get:
>=20
> telnet> send brk=20
> KDB: enter: Line break on console
>=20
> And nothing more. Which means the box is sort of alive, but fails to pres=
ent
> even the kernel debugger. The machine is currently on 5.4 as of yesterday=
.
> It's been hanging before (with anything from days to weeks between), unde=
r
> various variations of 5.x, but I haven't had the serial console before no=
w.
>=20
> Has any one seen this before? Any ideas what I could look at? I suspected
> hardware, but it seems that isn't the case as most HW errors I've seen wo=
uld
> cause a total freeze.
>=20
> Here's to hoping.
>=20
> Thanks,
> /Eirik