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Re: CPU fans shut off by Debian?



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  The server chassis has been replaced by 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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