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Howard
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Fan get max speed when macbook pro is waking up from sleep

27 Aug 2013, 01:42

Hi,

Every time my macbook pro is waking up from sleep, the fan will reach it's max speed and produce big noise although the temperature is not high. It seems to be a bug of Fan Control.

Regards,Howard.
 
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Steven
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Re: Fan get max speed when macbook pro is waking up from sleep

27 Aug 2013, 08:23

It's normal behavior of any MacBook Pro, the fan is rotated to a MAX speed for a second after waking from sleep. You can try uninstalling MFC and see that this behavior remains.
 
Howard
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Re: Fan get max speed when macbook pro is waking up from sleep

29 Aug 2013, 00:39

Steven wrote:
It's normal behavior of any MacBook Pro, the fan is rotated to a MAX speed for a second after waking from sleep. You can try uninstalling MFC and see that this behavior remains.



That is not true. I tested two policy as following.

1) Set Fan Control to use 'Automatic(controlled by system)'
2) Set Fan control to use 'Sensor-based value' with option 'CPU core 0' starting from 40C and max is 75C


After set the policy, I make the macbook sleep then wake it up. For policy 1, the fan seed is 2145rpm and the temperature 53C. For policy 2, the fan speed is 8123rpm and the temperature is 43C.

As you can see, when macbook pro wakes up from sleep, the fan speed will reach it's max value unless the system default is used.
 
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Steven
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Re: Fan get max speed when macbook pro is waking up from sleep

29 Aug 2013, 11:42

Please post screenshots of the app:

- main window with fan speed 8123 rpm
- fan control dialog where you set it's rotation based 'CPU core 0' starting from 40C and max is 75C

When you wake, and fan is at MAX, does it remain at the same speed forever?
 
Howard
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Re: Fan get max speed when macbook pro is waking up from sleep

29 Aug 2013, 12:49

1. Fan speed with system default policy
b830f3a8e5323ceda4de565730fa15b0.jpeg
b830f3a8e5323ceda4de565730fa15b0.jpeg (8.64 KiB) Viewed 13416 times


2. Change the policy
c98bf2f5984b2466b874c5870b4fecba.jpeg
c98bf2f5984b2466b874c5870b4fecba.jpeg (98.6 KiB) Viewed 13416 times


3. Fan speed with above policy. The max speed will exist 2s then come back to normal
5647fe4023d23f0ff1f1b59c36688ee4.jpeg
5647fe4023d23f0ff1f1b59c36688ee4.jpeg (8.43 KiB) Viewed 13416 times
 
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Steven
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Re: Fan get max speed when macbook pro is waking up from sleep

29 Aug 2013, 12:52

thank you very much. Main Window screenshot as well please.

Does it actually spin to 8123 rpm or only display this value?
 
Howard
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Re: Fan get max speed when macbook pro is waking up from sleep

29 Aug 2013, 13:32

it actually spin to 8123 rpm and generate a big noise. It remains about 2 seconds then come back to normal.

The full screenshot is a little big (3M) and I failed to upload it. Could you pm me your email?
 
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Steven
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Re: Fan get max speed when macbook pro is waking up from sleep

29 Aug 2013, 13:36

PM Sent, thank you
 
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Steven
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Re: Fan get max speed when macbook pro is waking up from sleep

29 Aug 2013, 13:50

Received. Noticed some issues:

- misusing of MFC: you shouldn't set both fans to cool only CPU. Check which fan cools CPU manually (I'm not aware of this information on MacPro retina). The other fan is probably for cooling GPU
- I'd also say that 75 is very low value for maximum CPU TEMP. I guess that max temp is about 90-95C for this type of processor
- please update to version 1.1.0.
- one should disable iStatMenus fan controlling if set when using Macs Fan Control
 
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Steven
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Re: Fan get max speed when macbook pro is waking up from sleep

05 Sep 2013, 18:43

I've reproduced the issue, it will be fixed in 1.1.1
 
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Steven
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Re: Fan get max speed when macbook pro is waking up from sleep

06 Sep 2013, 20:27

Fixed in 1.1.1

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