Messages in this thread | | | Date | Thu, 24 Aug 2006 17:15:14 +0100 | From | Matthew Garrett <> | Subject | Re: cpufreq stops working after a while |
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On Thu, Aug 24, 2006 at 10:44:28AM -0400, Mark Lord wrote:
> By definition, "passive" cooling never needs enabling -- this just refers > to things like heat sinks and air vents.
In ACPI terms, passive cooling is forced downthrottling of the CPU in order to reduce heat generation. This is normally done if the temperature is continuing to rise despite active cooling being enabled.
On some hardware you can set the values at which different types of cooling will be enabled in /proc/acpi/thermal_zone/*/trip_points. Echo a colon separated list of values in there to rewrite them. Some BIOSes will change the trip points in response to various events, which will then overwrite your values.
-- Matthew Garrett | mjg59@srcf.ucam.org - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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