OFW Q3A15

[Rafael Enrique Ortiz Guerrero]

Rafael Ortiz



On Tue, Nov 3, 2009 at 10:54 AM, Mitch Bradley <wmb at laptop.org> wrote:
>
>
> Emiliano Pastorino wrote:
>> Mitch,
>>
>> Does q3a15 automatically throttle the processor in case of overheating?
>
> Yes
>
>>
>> If so, is there a way to check if it is working? cat /proc/cpuinfo maybe?
>>
>>
>
> Here is a test you can do with Open Firmware:
>
> ok show-temperature (cr many
>
> That command runs the CPU in full-on C0 state - no halts or other
> power-saving states - and displays the temperature.   If you have no
> heat spreader, the temperature will soon rise to 100 degrees C, and then
> the throttling will start, maintaining the temperature between 95 and
> 100 degrees.  With the heat spreader, the temperature should stay much
> lower, never reaching the 100 degree throttle point.  In my current
> setup with the plastic back off, the board with the heat-spreader goes
> up to about 45 degrees.

Testing with the back plastic on temperature could go to 90,
running
ok show-temperature (cr many
for an hour or more, lets hope the new heat spreader design can lower
that threshold.




>
> There is a way to check the temperature under Linux.  It involves the
> "lmsensors" package, but I don't know the exact details.
>
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