Loud fan on Powermac G5

[Arrigo Benedetti]

I was told by Kai of TerraSoft that fan control has been removed from 
the RC3 release due to firmware
changes made by Apple that would make the current temperature control 
algorithm unsafe. Hopefully fan
control will be back in the next release.

-Arrigo

Andrew Zschetzsche wrote:

>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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>>>      
>>>
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>>    
>>
>
>-- Andrew Zschetzsche
>zsche004@mrs.umn.edu
>aim: zsche004
>msn: zsche004@mrs.umn.edu
>UMM Mail 1262
>
>--The best answer to a problem with multiple solutions is often the simplest
>one.
>
>
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>  
>