Date: 22 Jun 2005 11:46:31 -0400 From: Lowell Gilbert <freebsd-questions-local@be-well.ilk.org> To: Matthew Flanagan <flanagan.matt@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: Raising temperature threshold Message-ID: <44br5y5r8o.fsf@be-well.ilk.org> In-Reply-To: <7cd06a2d05062205331d03372c@mail.gmail.com> References: <7cd06a2d05062205331d03372c@mail.gmail.com>
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Matthew Flanagan <flanagan.matt@gmail.com> writes: > I`ve installed a FreeBSD 5.4-STABLE and I was building some ports when > suddenly my system shut down. Upon rebooting it and checking > /var/log/messages, I found the following lines: > > Jun 21 16:01:30 bell root: WARNING: system temperature too high, > shutting down soon! > Jun 21 16:01:40 bell kernel: acpi_tz0: WARNING - current temperature > (60.0C) exceeds safe limits > > Then I realized what had happened. My acpi_thermal sysctl's are: > > hw.acpi.thermal.min_runtime: 0 > hw.acpi.thermal.polling_rate: 10 > hw.acpi.thermal.tz0.temperature: 50.0C > hw.acpi.thermal.tz0.active: 0 > hw.acpi.thermal.tz0.thermal_flags: 1 > hw.acpi.thermal.tz0._PSV: 50.0C > hw.acpi.thermal.tz0._HOT: -1 > hw.acpi.thermal.tz0._CRT: 60.0C > hw.acpi.thermal.tz0._ACx: 50.0C -1 -1 -1 -1 -1 -1 -1 -1 -1 > > When I try to raise hw.acpi.thermal.tz0._CRT to 85C (which is the threshold in > the BIOS setup) it doesn't work: > > bell# sysctl hw.acpi.thermal.tz0._CRT=3580 # 3580 tenths of Kelvin=85C > sysctl: oid 'hw.acpi.thermal.tz0._CRT' is read only > > I've tried /etc/sysctl.conf as well, but I get the same error. > > Now, my question is: how do I change this value? I've read several manpages > (acpi(4), acpi_thermal(4), acpiconf(8), and many others) and checked the > handbook, to no avail. Can anyone point me to the right direction? Can it be set at boot time? [from the loader?]
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