Re: [APM] CPU idle calls causing problem with ASUS P4PE MoBo
From: Arjan van de Ven (arjanv_at_redhat.com)
Date: 08/07/03
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To: Kathy Frazier <kfrazier@mdc-dayton.com> Date: Thu, 07 Aug 2003 18:57:45 +0200
On Thu, 2003-08-07 at 18:08, Kathy Frazier wrote:
> I am experiencing problems with the CPU idle call feature on an ASUS P4PE
> (Intel 82845PE MCH and Intel 82801DB ICH4 chipsets). I am using kernel
> 2.4.20-8 (Red Hat 9.0).
that's an old kernel.. several updates have followed since... several
machines have been added to the apm idle blacklist in later kernels
>
> We were having trouble with our system "hanging"
> after running for a while. By this I mean, that no IRQs are getting
> through, but software components are still running. We have a proprietary
> PCI DMA bus master device that works fine in PIII system, but the plans are
> to ship our product using this ASUS MoBo. In the process of trying to debug
> this problem, we have updated BIOS, tweaked BIOS parameters, added debug to
> the kernel to determine the status of our IRQ, etc. When I changed the
> CONFIG_APM_CPU_IDLE to no, our 3 hour test runs to completion. Previously
> this test would cause the system to hang within minutes. I have tried
> various combinations of APM tweaking with the following results:
if you can mail the top part of the dmidecode output (the part that has
the bios idents) the machine can trivially be added to the apm idle
blacklist.
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