Loud fan on Powermac G5

[Andrew Zschetzsche]

There are two firmware updates, and one OS update for G5s on
www.apple.com/downloads/macosx/apple/.

One labeled "Power Mac G5 Firmware Update 5.1.4" specifically states "...
and improves fan behavior in Open Firmware."  The other firmware update does
not mention fan control (but might help); and the OS update, well, wouldn't
make a bean's difference in linux.

Or it could be hardware.  If you know it's the machine, try this first.


On 9/15/04 9:00 PM, "Ryan Spaulding" <ryanspaulding@gmail.com> wrote:

> It might be a hardware issue. We had 3 loud G5's come in and 2 were
> fixed with an update. The last one needed a new motherboard.
> 
> On Wed, 15 Sep 2004 18:32:39 -0600, Francis X. Maier <franx@qwest.net> wrote:
>> Why more likely?  Actually, I spoke directly with Mac tech on this.
>> 
>> Fran
>> 
>> 
>> 
>> 
>> On Sep 15, 2004, at 4:12 PM, Stefan Bruda wrote:
>> 
>>> At 10:47 -0700 on 2004-9-15 Arrigo Benedetti wrote:
>>>> 
>>>> I've had the same problem on and off in OSX.3.5.  It's a machine
>>>> design issue, not YDL.  Have the Mac tech guys check it out.
>>> 
>>> This is *so* unlikely.  It is by far more lilely to be a matter of
>>> kernel configuration.  So check first that you have CONFIG_THERM_PM72
>>> (Device Drivers -> Macintosh device drivers -> Support for thermal
>>> management on PowerMac G5) set in your kernel (if it is not, then set
>>> it, recompile your kernel, and see whether the problem disappears).  I
>>> have heard reports that some kernels will not control the fans even
>>> with CONFIG_THERM_PM72 set, but I am not sure which versions (it
>>> worked for every kernel I worked with, but then I started directly
>>> with a 64-bit kernel on my G5).  Also see
>>> http://forums.gentoo.org/viewtopic.php?t=214051
>>> 
>>> Stefan
>>> 
>>> --
>>> If it was so, it might be; and if it were so, it would be; but as
>>> it isn't, it ain't. That's logic.
>>>     --Lewis Carroll, Through the Looking-Glass
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>> 
>> 
>> 
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-- Andrew Zschetzsche
zsche004@mrs.umn.edu
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UMM Mail 1262

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