Re: [Mactel-linux-users] Does lm-sensors work on MBP?

[Nicolas B. <ni...@bo...>]

Hello,

Ludovic Rousseau wrote:
> On 15/10/06, Nicolas Boichat <ni...@bo...> wrote:
>   
>> I added support for fan control in applesmc. I use the attached script
>> to control the fans, as the left side is almost always warmer, I set the
>> speed of the left side to 2x the speed of the right side (controlled by
>> SMC), and set the minimum speed to 3500 RPM instead of 1000 RPM on that fan.
>>     
>
> Works fine.
>
> What happens if you set both fan to manual setting at the minimum
> speed and you load the CPU? 
The temperature will get higher and higher (yes, higher than usually) .-)
> Is there a security to that will increase
> the fan speed automatically? 
No. If it's in manual mode, it's in manual mode. I don't think the SMC
controller will take care of that (I just tried it now, maybe there is a
protection).
> The CPU will just reset using its
> internal temperature protection?
>   
Probably the system will first slow down (throttle), and then hang if
the temperature is too high. (That's what the Pentium 4 does, see below)
> Is it possible to burn the CPU and/or the video chip by doing such
> stupid things?
>   
I think things like that don't happen on modern systems anymore :
http://www.tomshardware.com/2001/09/17/hot_spot/index.html (look at the
video, it's quite impressing). So I'm quite sure the CPU won't burn, as
it has a temperature sensor integrated in the chip. For the GPU, I don't
know, but I suppose (and hope) it is the same.

Best regards,

Nicolas