[Bug 18164] CPU fan not activating on HP NX6125

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Tue Dec 13 07:42:05 UTC 2005

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------- Additional Comments From macer at ukzn.ac.za  2005-12-13 07:42 UTC -------
(In reply to comment #17)

> I don't know if you're aware of some of the patches that were posted by a couple
> of Intel's ACPI guys in the bug at
> http://bugzilla.kernel.org/show_bug.cgi?id=5534 . In any case, no one has
> reported that the patches solved their problems.

Those patches do nothing to solve the problem. They simply enable polling in the
event that the ACPI subsystem does not provide a _TZP method (which, apparently,
the nx 6125 DSDT does not). You can accomplish the same effect with much less
ado, by simply echoing 5 into each of
/proc/acpi/thermal_zone/TZ[1-3]/polling_frequency. Polling won't work, I tried
it a long time ago. It makes things worse than asynchronous mode. 

The other patches are simply for diagnostic purposes. I have tried the kernel
patch and my results are posted at bugzilla.kernel.org (#5534). There is also a
DSDT diagnostic patch which will echo messages whenever thermal events are
generated. I haven't tried this. Optimally, the developers need to get their
hands on one of these machines and observe this behaviour first hand...

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