Powermac G4 randomly shutting down

[Derick Centeno]

Just a point of reference:

APC: www.apc.com

UPS: uninterruptible power supply

On Jul 18, 2005, at 5:30 PM, Derick Centeno wrote:

> It does make sense to check that your computer area is properly 
> cooled.  However, you must not only check for heat you must also check 
> for humidity.
> You can check the computing environment simply with a nice clock which 
> has a temperature and humidity dial, some also come with barometric 
> pressure dials.
> Of course that is only useful if you know the manufacturer's published 
> recommendations as to what environmental tolerances your computer (and 
> each individual peripheral) should operate at best AND worst.  That 
> information is there, just for this kind of situation.
>
> The behavior as you describe it is typical of computers protecting 
> themselves without notifying either users or system administrators 
> which is why serious systems serving lots of people have always been 
> located in one centralized environmentally controlled area which was 
> constantly monitored.  Don't be surprised that a lot of people don't 
> know about this or won't discuss it.  Expertise and knowledge 
> regarding all this have moved upscale.
>
> Another source of problems computers is power, such as too much 
> (powersurges), too little (brownouts), Lightning strikes, and more.  
> Most, if not all can be handled with a sufficiently stable and 
> reliable UPS.  If you don't want to screw around, and your equipment 
> matters to you, get an APC ups.  Get a UPS which will support your 
> system (that is run (as in provided power to) your ENTIRE computing 
> environment  (printers, servers, routers, etc.) just from it (all by 
> it's lonesome) for at least 15 minutes.  Giving you time to backup and 
> then shutdown everything.  Without a UPS, you have exactly the kind of 
> behavior you describe.
>
> All this means that one behavior can have several different causes.  
> It is up to you to identify which it is.
>
> OK.  Let's imagine you did all that.  What next?
>
> Double check that your system settings are what you expect them to be. 
>  No auto-shutdown presets on. No powersavers on unless you control 
> precisely when.  And so on.
> Of course, some people would check those settings first.
>
> Best wishes...
>
> On Jul 18, 2005, at 3:59 PM, Jackson Jones wrote:
>
>> I have a Quicksilver Powermac G4 Quicksilver Tower that randomly 
>> powers off (not a clean shutdown).
>>
>> 933Mhz G4 (single Processor)
>> 1 Gig of RAM
>> YellowDog Linux 4.0.1 with all "yum update"
>> Stock kernel
>> NVidia GeForce 2 video card
>>
>> Has anyone seen this, or run into this before.
>>
>> Thanks
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>
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