Colin wrote: [snip] >> What is a safe temperature for the CPU? Could I just set the >> cpu_limit to 55? If so, how would I do that? > >echo 5 > /sys/devices/temperatures/limit_adjust >(this will add 5 to the default 50°C) > >I should give a look at Darwin's drivers to see whether default >temperatures are different for your model, and adapt the driver if >necessary.
Thanks. That makes the fan noise tolerable as the fan never goes above 199 rpm with normal operation and the temp hovers at 61-62.
However, I discovered that I had not compiled in the userspace module for cpu frequency management, so the only scaling governor I had was "performance" which runs the processor at 1.5 GHz the whole time. By adding the userspace module I can also add the "powersave" scaling governor. I suspect this will help a lot. I'm recompiling now.
However, one thing that is clear is that when the processor runs at 1.5Ghz (full-speed) for even a few minutes, the fan will ramp up to full speed and pretty much stay there forever. That's not particularly desirable, so perhaps investigating Darwin's approach is still a good idea.
Brian
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