Powerpc64 power management control

[Jason Bacon]

Interestingly, the firmware update did not seem to help with my 
PowerMac.  Everything was fine after the first reboot following the 
update, but after rebooting again, I got runaway fans again after a few 
minutes.

Pondering what might be different on the first boot, I noted two things:

1. The prior boot had been into OS X, so maybe it properly reset some 
hardware where FreeBSD fails to?
2. For the first FreeBSD boot, I still had a monitor, keyboard, and 
mouse attached from performing the firmware update in OS X. Most of the 
time, I run this system headless.

Testing #2 first, I rebooted with and without a monitor a few times.  
Every time I boot headless, I get runaway fans.  Every time I boot with 
a monitor attached, there's no problem.  I can detach the monitor after 
boot without triggering the issue.

Seems like an odd linkage, but perhaps failure of the video driver to 
initialize properly is triggering the fan issue?

On 2020-06-27 23:34, sid_holliday2001 at yahoo.com wrote:
> Yes thank’s
>
> Sent from my iPhone
>
>> On Jun 27, 2020, at 7:51 PM, Jason Bacon <bacon4000 at gmail.com> wrote:
>>
>> 
>> Thanks, I found it by searching the support site.
>>
>> But did it solve the fan issue for you?  So far so good for me - no runaway fans on my first FreeBSD boot following the firmware update.
>>
>> Cheers,
>>
>>      JB
>>
>>> On 2020-06-27 16:32, sid_holliday2001 at yahoo.com wrote:
>>>
>>> http://support.apple.com/kb/DL627?viewlocale=en_US
>>>
>>>
>>> Sent from my
>>> Hope this helps the link is above the picture if it came though if not go to Apple support and type firmware update 5.1.4
>>>>> On Jun 27, 2020, at 10:17 AM, Jason Bacon <bacon4000 at gmail.com> wrote:
>>>> 
>>>> Hi Sid,
>>>>
>>>> Did the firmware update fix the issue for you?  If so, do you still have the link to the download site?
>>>>
>>>> Thanks,
>>>>
>>>>      JB
>>>>
>>>> On 2020-05-26 23:03, sid_holliday2001 at yahoo.com wrote:
>>>>> Thx I will try that and also I found out their is a firmware update on the Apple site for version 10.3 which I have on a separate hard drive that I can boot to so I will also try that because it also addresses the fans.
>>>>>
>>>>> Sent from my iPhone
>>>>>
>>>>>> On May 26, 2020, at 3:56 PM, Jason Bacon <bacon4000 at gmail.com> wrote:
>>>>>>
>>>>>> Is is a PowerMac G5?
>>>>>>
>>>>>> If so, this is a known issue that's not due to power consumption.  There seems to be something in the boot process that's not being initialized consistently, so after most boots, the fans ramp up after a few minutes or so.  I've found that rebooting has a small probability of eliminating the issue, so if you can get a clean boot where the fans don't go nuts within a few minutes, you should be OK until the next reboot.
>>>>>>
>>>>>>      JB
>>>>>>
>>>>>>> On 5/26/20 3:52 PM, Sidney Holliday via freebsd-ppc wrote:
>>>>>>> Hi my name is Sid I’m new to FreeBSD I have already installed version 12.1 and have not yet loaded the desktop Gnome3 because the fans keep going to high speed, I tried to use the POWRD utility but it looks like that doesn’t work with this machine. Is their a power utility in FreeBSD or a third party utility or does anyone know if maybe IBM would have a utility for this?
>>>>>>>
>>>>>>>
>>>>>>> MGRBYASKYTDAED
>>>>>>> _______________________________________________
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>>>>
>>>> -- 
>>>> Earth is a beta site.
>>>>
>>>>
>>
>> -- 
>> Earth is a beta site.
>>
>>


-- 
Earth is a beta site.