Date: Wed, 20 Feb 2008 14:48:06 -0800 From: "Kevin Oberman" <oberman@es.net> To: Daniel Eischen <eischen@vigrid.com> Cc: acpi@freebsd.org, "Alexandre \"Sunny\" Kovalenko" <alex.kovalenko@verizon.net> Subject: Re: How to disable acpi thermal? Message-ID: <20080220224806.738E94500F@ptavv.es.net> In-Reply-To: Your message of "Wed, 20 Feb 2008 17:15:45 EST." <Pine.GSO.4.64.0802201711090.7855@sea.ntplx.net>
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--==_Exmh_1203547686_81195P Content-Type: text/plain; charset=us-ascii Content-Disposition: inline > Date: Wed, 20 Feb 2008 17:15:45 -0500 (EST) > From: Daniel Eischen <eischen@vigrid.com> > Sender: owner-freebsd-acpi@freebsd.org > > On Fri, 15 Feb 2008, Alexandre "Sunny" Kovalenko wrote: > > > > > On Tue, 2008-01-15 at 15:34 -0500, Daniel Eischen wrote: > >> [ Redirected from -current ] > >> > >> On Mon, 14 Jan 2008, Alexandre "Sunny" Kovalenko wrote: > >> > >>> > >>> On Mon, 2008-01-14 at 21:56 -0500, Daniel Eischen wrote: > >>>> > >>>> Thermal zone 0 skyrockets past 110C in a couple of minutes > >>>> when trying to build a kernel. All the other zones stay > >>>> relatively static. I suspect something is wrong somewhere > >>>> because this machine is very lightly loaded and has never > >>>> had a problem until now. I just upgraded it from 4.x to > >>>> 7.0. > >>> > >>> It need not to be bogus -- if I turn off fan on my ThinkPad it will > >>> overheat and shut itself down within couple of minutes of buildworld, > >>> starting from the relative cool state. From the look of the stuff below > >>> your fan should kick in no later then 10 seconds after tz0 reached 77C. > >>> Do you hear it running before shutdown? If yes, maybe lowering threshold > >>> in AC0 down from 77C will help. If not -- you will need to figure out > >>> who is supposed to turn on the fan. You can dump your ASL (instructions > >>> in the handbook) and post it someplace accessible -- I will take a look > >>> and maybe spot something interesting, but, being far from the expert in > >>> the field, I do not promise too much. > >> > >> I posted the acpidump here: > >> > >> http://people.freebsd.org/~deischen/stl2.iasl > >> > >> The problem is that acpi_thermal keeps shutting down the system > >> after 2 minutes into a buildkernel. The system has no load other > >> than the buildkernel at the time it shuts down. > >> > >> The system is a Intel STL2 Tupelo motherboard with 1 CPU, the > >> other CPU socket being occupied by a CPU terminator thingy. > >> I uncovered the rackmount system and watched it while building > >> a kernel. With the cover off the acpi monitored temperature > >> went to 107C and stayed there. It only took a minute or two > >> to get there. I felt around inside the chassis and nothing > >> was even near being to warm or hot. With the cover on, the > >> temperature goes to 111/112C before being shutdown by acpi_thermal > >> (the limit being 110C). There is no way anything in that > >> chassis is anywhere near 100C. I've disabled acpi_thermal > >> for now, but it'd be nice to get a better fix. > >> > >> Any ideas? > >> > > You can try this patch on your ASL, which might just cause passive > > cooling to kick in. If you decide to try a patch, I would like to see > > the output of > > I guess I'm confused - how can passive cooling "kick in". Isn't > passive cooling always on if you are using a heatsink? We need some definitions: Active cooling = fan speed Passive cooling = Slowing the speed of the processor to prevent overheating. So "passive cooling kicks in" when the thermal zone temperature reaches the value of _PSV in ACPI. The CPU slows by some amount, depending on the capabilities of the system (P4TCC, SpeedStep, Enhanced SpeedStep, EIST, Enhanced EIST). More capable versions change both CPU speed and voltage. http://en.wikipedia.org/wiki/SpeedStep -- R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: oberman@es.net Phone: +1 510 486-8634 Key fingerprint:059B 2DDF 031C 9BA3 14A4 EADA 927D EBB3 987B 3751 --==_Exmh_1203547686_81195P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.8 (FreeBSD) Comment: Exmh version 2.5 06/03/2002 iD8DBQFHvK4mkn3rs5h7N1ERArheAKCNlSLYCo2l2t2SFfrgMcFWuJ7sxQCfZed7 9teZadYGlsNHWcyeN6K7AN8= =ohma -----END PGP SIGNATURE----- --==_Exmh_1203547686_81195P--
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