Date: Wed, 01 Aug 2007 21:17:29 -0700 From: Julian Elischer <julian@elischer.org> To: Garrett Cooper <youshi10@u.washington.edu> Cc: acpi@freebsd.org, freebsd-hackers@freebsd.org, ume@freebsd.org, gahr@gahr.ch Subject: Re: [patch] enhance powerd(8) to handle max temperature Message-ID: <46B15AD9.60406@elischer.org> In-Reply-To: <46B15166.1070305@elischer.org> References: <46AE58B5.3080506@gahr.ch> <yge4pjl1i7f.wl%ume@mahoroba.org> <46AE8F78.1060203@root.org> <20070801.211718.1683324313.imp@bsdimp.com> <46B14EFB.6010207@u.washington.edu> <46B15166.1070305@elischer.org>
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Julian Elischer wrote: > Garrett Cooper wrote: >> M. Warner Losh wrote: >>> In message: <46AE8F78.1060203@root.org> >>> Nate Lawson <nate@root.org> writes: >>> : Hajimu UMEMOTO wrote: >>> : >>>>>> On Mon, 30 Jul 2007 23:31:33 +0200 >>> : >>>>>> Pietro Cerutti <gahr@gahr.ch> said: >>> : > gahr> My patch is really just a first draft that I wrote in order >>> to have >>> : > gahr> feedbacks on the general idea to implement a temperature >>> controlling >>> : > gahr> system inside powerd, and doesn't implement hysteresis as >>> you noted, and >>> : > gahr> your feedback is that it's not a good idea, which I respect. >>> : > : > It is rather backward, IMHO. I did implement a passive cooling >>> : > feature as an enhancement of powerd(8) like you did, during initial >>> : > phases. Then, I implemented it in our kernel as a result. >>> : : I'll take a look at your patch. Umemoto-san is right in that you >>> really >>> : want the kernel to control cooling. What happens if powerd dies/hangs >>> : and your system burns up? Passive cooling is often a last resort to >>> : keep the system from overheating. >>> >>> I keep getting the system shutting down on my HP by FreeBSD because >>> the temperature exceeds the _CRT value. Maybe there's something wrong >>> with my values, since it happens a lot: >>> >>> hw.acpi.thermal.min_runtime: 0 >>> hw.acpi.thermal.polling_rate: 10 >>> hw.acpi.thermal.user_override: 0 >>> hw.acpi.thermal.tz0.temperature: 0.0C >>> hw.acpi.thermal.tz0.active: -1 >>> hw.acpi.thermal.tz0.passive_cooling: 1 >>> hw.acpi.thermal.tz0.thermal_flags: 0 >>> hw.acpi.thermal.tz0._PSV: 90.0C >>> hw.acpi.thermal.tz0._HOT: -1 >>> hw.acpi.thermal.tz0._CRT: 94.0C >>> hw.acpi.thermal.tz0._ACx: 40.0C -1 -1 -1 -1 -1 -1 -1 -1 -1 >>> >>> Note: temperature is always 0.0C. >>> >>> What can I do to help my situation, if I really want the kernel doing >>> the cooling? >>> >>> Warner >>> >> >> Wow, something's really wrong with those calculated temperatures. At >> that value most of the plastic and weaker circuitry should have fused >> together =\. > > It would be interesting to see what the values are just after booting, > or even earlier if you can get the bios to give temperatures (some MBs > have that possibility) I might add, after all cooling down to room temperature over night. >
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