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Re: CPU fans shut off by Debian?

We did think that ACPI might have been the problem initially and tried to 
shut it off via boot arguements.  However, the fans failed in this mode of 
operation.  However, we did not know about the off by one bug at that 
point, might we not have been doing what we thought we were doing?  

I have posted my /var/log/syslog at the following location.  It's quite 
long and did not want to e-mail an attachment.  


Please let me know if I can provide any more information.  

	Thanks for your response.
	Stephen Lokitz

On Fri, 8 Jul 2005, 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  The server chassis has been replaced by 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...
> -- 
> Michael Bane
> Atmospheric Physics Group
> University of Manchester
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