From: Len Brown <lenb@kernel.org>
Organization: Intel Open Source Technology Center
To: Ken Moffat <zarniwhoop@ntlworld.com>
Subject: Re: x86 instability with 2.6.1{8,9}
Date: Tue, 2 Jan 2007 13:42:32 -0500
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Cc: linux-kernel@vger.kernel.org
References: <20070101160158.GA26547@deepthought> <200701021225.57708.lenb@kernel.org> <20070102180425.GA18680@deepthought>
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On Tuesday 02 January 2007 13:04, Ken Moffat wrote:
> On Tue, Jan 02, 2007 at 12:25:57PM -0500, Len Brown wrote:
> > > it's been nothing but trouble in 32-bit mode.
> > > It still works fine when I boot it in 64-bit mode. 
> > 
> > A shot in the dark at the spontaneous reset issue, but no clue on the 32 vs 64-bit observation...
> > 
> > See if ACPI exports any temperature readings under /proc/acpi/thermal_zone/*/temperature
> > and if so, keep an eye on them to see if there is an indication of a thermal problem.
> > 
> > ( And if ACPI doesn't, maybe lmsensors can find something.)
> > 
> > cheers,
> > -Len
> 
>  Thanks, but there is nothing there.  I never managed to get
> lmsensors configured (as in 'calibrated') for the hardware I tried it
> on, but I was starting to think about retrying it.  But first, I'm
> just about to start testing with memtest86+ in case something in the
> memory has gone bad.

You might remove and re-insert the DIMMS.
Sometimes there are poor contacts if the DIMMS are not fully seated and clicked in.

The real mystery is the 32 vs 64-bit thing.
Are the devices configured the same way -- ie are they both in IOAPIC mode
and /proc/interrupts looks the same for both modes?

-Len
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