Date: Sun, 17 Feb 2008 02:37:31 +0900 From: Hajimu UMEMOTO <ume@freebsd.org> To: Johannes Dieterich <dieterich.joh@googlemail.com> Cc: freebsd-acpi@freebsd.org Subject: Re: [RFC] Patch to enable temperature ceiling in powerd Message-ID: <ygeejbckdk4.wl%ume@mahoroba.org> In-Reply-To: <47B71804.40002@gmail.com> References: <20080208045605.15C874500E@ptavv.es.net> <47ABF402.7030904@root.org> <1202475519.7014.7.camel@RabbitsDen> <yge1w7komar.wl%ume@mahoroba.org> <1203126071.833.19.camel@RabbitsDen> <47B6B913.9020505@gmail.com> <ygemyq1jge2.wl%ume@mahoroba.org> <47B6CC48.5070009@gmail.com> <47B6CD54.3020806@gmail.com> <ygeir0okikz.wl%ume@mahoroba.org> <47B71194.8090804@gmail.com> <ygefxvskfcp.wl%ume@mahoroba.org> <47B71804.40002@gmail.com>
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Hi,
>>>>> On Sat, 16 Feb 2008 18:06:12 +0100
>>>>> Johannes Dieterich <dieterich.joh@googlemail.com> said:
> dieterich.joh> # hw.acpi.thermal.tz1.passive_cooling=1
> dieterich.joh> su: hw.acpi.thermal.tz1.passive_cooling=1: command not found
>
> It should be `sysctl hw.acpi.thermal.tz1.passive_cooling=1'.
dieterich.joh> Sorry. Just a typing error. Works now. Should I try to make buildworld?
No problem. Please make sure hw.acpi.thermal.tz1.passive_cooling is 1
by typing `sysctl hw.acpi.thermal.tz1.passive_cooling' before trying.
If hw.acpi.thermal.tz1.passive_cooling is 1, passive cooling should be
working.
You can see if passive cooling is actually working by setting
hw.acpi.verbose to 1 using sysctl. While hw.acpi.verbose is 1,
changing cpufreq by passive cooling is logged into /var/log/messages
like:
Feb 17 02:26:19 kasuga kernel: acpi_tz0: temperature 86.8C: decreasing clock speed from 1200 MHz to 1000 MHz
Feb 17 02:26:23 kasuga kernel: acpi_tz0: temperature 78.8C: resuming previous clock speed (1200 MHz)
Sincerely,
--
Hajimu UMEMOTO @ Internet Mutual Aid Society Yokohama, Japan
ume@mahoroba.org ume@{,jp.}FreeBSD.org
http://www.imasy.org/~ume/
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