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Programmatically test for fan pulsing in new laptops?
Posted: Thu Jul 07, 2011 11:14 pm
by AstatineRaven
Hello. Is it possible for a Windows or other program to test for the fan pulsing problem in the newer laptops? Can such a program read actual fan speed or just the fan speed the EC firmware reports? Can such a program read fan speed frequently enough and with enough resolution?
Re: Programmatically test for fan pulsing in new laptops?
Posted: Thu Jul 07, 2011 11:18 pm
by Harryc
Not possible from the utilities I have seen. All reported fan pulsing over the years has been reported anecdotally via individual noise perception.
Re: Programmatically test for fan pulsing in new laptops?
Posted: Fri Jul 08, 2011 12:34 pm
by AstatineRaven
I don't know how to interpret that first sentence. Are you saying you've seen developers attempt it but run into a limitation that prevents it, or are you just saying that you haven't seen any programs that can do it?
Re: Programmatically test for fan pulsing in new laptops?
Posted: Fri Jul 08, 2011 7:33 pm
by Harryc
AstatineRaven wrote:... are you just saying that you haven't seen any programs that can do it?
That one ...
Re: Programmatically test for fan pulsing in new laptops?
Posted: Fri Jul 08, 2011 9:32 pm
by AstatineRaven
Thanks for the clarification. Not that I understand exactly what causes the pulsing, but I can't help but wonder if it is possible to log fan speed and see the behavior. I didn't look at the tp4xfancontrol source too closely as it doesn't appear current, but if I remember correctly update interval appeared artificially constrained to a multiple of 1000 ms.
Troubadix: Can fan RPM be read more frequently and the fluctuation captured?