Re: CPU fans shut off by Debian?

From: michael (linux_at_networkingnewsletter.org.uk)
Date: 07/08/05

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    To: debian user <debian-user@lists.debian.org>
Date: Fri, 08 Jul 2005 17:00:23 +0100

    On Fri, 2005-07-08 at 15:39 +0100, michael wrote:
    > On Fri, 2005-07-08 at 09:58 -0400, Stephen Lokitz wrote:
    > > Hello,
    > > I am running Sarge 2.4.27-2-686-smp on an intel SR1435VP2(which is
    > > a 1U server platform) with dual 2.8 Xeon processors. I am required to
    > > run the 2.4 kernel for my application. What appears to happen is that at
    > > some random time after power on (~6-20 hrs), the cpu fans shut off which
    > > causes the system to overheat and shut down. I can immediately restart
    > > the system but the fans will not come on for 2-3 hrs after the initial
    > > fail. The system without fans can only run for ~5 min before overheating
    > > and shutting down again. Physically unplugging the power cord does not
    > > affect this 2-3 hour time window. The server chassis has been replaced by
    > > the vendor once. The server has been plugged into different outlets and
    > > at different locations. We have already learned about the off by one bug
    > > with acpi and are now passing the acpi=force kernel boot arguement. ACPI
    > > is running, but the fans still stop and the system overheats. We have
    > > been fighting this for about 6 weeks now. Any suggestions would be
    > > appreciated. Please inform me if I have not provided enough information.
    >
    >
    > Maybe I've misunderstand but if you have more than a single processor, I
    > thought you must not use ACPI. Otherwise it may think, oh one of the
    > processors is idle so I can power down... (and not realize your other
    > processor is busy)
    >
    > However, this seems inconsistent with it not working when you then come
    > back up.
    >
    > I guess we'd need to see your /var/log/syslog for more info...

    actually, I think I was getting confused with APM not being thread safe
    (and that the same is not true of ACPI) 

    -- 
Michael Bane
Atmospheric Physics Group
University of Manchester
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