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Re: Powerbook 12" 1.5 GHz, therm_adt746x, thermal issues



On 24.05.2007, at 07:05, Jones wrote:


Andreas,

I am having the same problem with this laptop(mine is 1.33GHz). A walk around solution will be to slow down the cpu speed.

(root or using sudo) echo powersave > /sys/devices/system/cpu/cpu0/ cpufreq/scaling_governor

In my case this CPU speed will be halved which is 0.66Ghz. It's not a good solution but the laptop didn't shutdown anymore for overheat.



Yes i use the powernowd as the userspace frequency scaler which can step (or if necessary restrict) the CPU down to 750 MHz. It could be feasible to create a daemon that does that automatically if the CPU gehts to hot. I wonder if MacOS X just does not care about the termperature as much as Linux or if Apple simply also steps the CPU down temporarily (or even periodically) when the CPU is getting too hot.



I hope someone could provide a better solution.



Me too. I´m right now also stepping the CPU back manually when I have to copy a lot of files to the external HD (like making backups using rsync). And this is definitely not a pretty solution.

Does anyone know how to increase the shudown temperature of the kernel. I´d risk some degrees to see if this works - And it should work like running without the "therm_adt746x" module proved. I´m even considering abandoning the module completely - if only someone could tell me what would happen then (or even why the fan control does work without it too...)

bye Andreas



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