Another acpi_thermal nit

Hajimu UMEMOTO ume at freebsd.org
Thu Sep 8 09:01:24 PDT 2005


Hi,

>>>>> On Thu, 08 Sep 2005 08:32:35 -0700
>>>>> "Kevin Oberman" <oberman at es.net> said:

oberman> It would really be nice to be able to slow the system below where
oberman> acpi_thermal has lowered it. I just don't know if this is a matter of
oberman> code or a BIOS issue with no way out.

Yup, I understand your needs.  But, it is rather by design of
acpi_thermal.  However, you can stop passive cooling by setting
hw.acpi.thermal.tz0.passive_cooling to zero even when passive cooling
is active.  You can do the following step:

  1) sysctl hw.acpi.thermal.tz0.passive_cooling=0
  2) Set your favorite CPU speed by dev.cpu.0.freq
  3) sysctl hw.acpi.thermal.tz0.passive_cooling=1

Sincerely,

--
Hajimu UMEMOTO @ Internet Mutual Aid Society Yokohama, Japan
ume at mahoroba.org  ume@{,jp.}FreeBSD.org
http://www.imasy.org/~ume/


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