Date: Tue, 11 Aug 2009 00:39:11 +0200 From: Roland Smith <rsmith@xs4all.nl> To: Christian Walther <cptsalek@gmail.com> Cc: stable@freebsd.org Subject: Re: Problem with IBM Thinkpad T30 shutting down due to high temperatures Message-ID: <20090810223911.GA60489@slackbox.xs4all.nl> In-Reply-To: <14989d6e0908101453i635bbf8fhf26094c3ad896c9c@mail.gmail.com> References: <14989d6e0908101453i635bbf8fhf26094c3ad896c9c@mail.gmail.com>
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--C7zPtVaVf+AK4Oqc Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Aug 10, 2009 at 11:53:10PM +0200, Christian Walther wrote: > Hello list, >=20 > for some time now my T30 shuts down due to temperatures exceeding the > safe limit of 92 degrees celcius. > Regardless to say that a 2GHz pentium4m powers the machine, and these > chips are "well known" for high temperatures. > But I'm unable to do anything that causes high load on the laptop: > Building world or complex ports makes the system reach the limit > within minutes. A few days ago I configured xcompmgr, which even seems > to make the problem whorse (yes, composite extension is enabled). > What I don't know is if this is a hardware error, or something caused > by the kernel. I wrote a small script to monitor dev.acpi_ibm.0.fan > dev.acpi_ibm.0.fan_level, hw.acpi.thermal.tz0.temperature and > dev.cpu.0.freq, and it sometimes appears that the temperature of the > CPU rises, but the kernel doesn't decrease the clock in time. If available, you can use acpi_thermal(4) to set the temperatures at which atcive cooling engaves. Look for the sysctl 'hw.acpi.thermal.tz%d._ACx', wh= ere %d is the core number and x is the cooling level. Or set the level manually with 'hw.acpi.thermal.tz%d.active'. Read the acpi_thermal manpage for more details. Roland --=20 R.F.Smith http://www.xs4all.nl/~rsmith/ [plain text _non-HTML_ PGP/GnuPG encrypted/signed email much appreciated] pgp: 1A2B 477F 9970 BA3C 2914 B7CE 1277 EFB0 C321 A725 (KeyID: C321A725) --C7zPtVaVf+AK4Oqc Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.12 (FreeBSD) iEYEARECAAYFAkqAoY8ACgkQEnfvsMMhpyV09wCfRBIlC7tNyUBGVci9xDVbmSjH AG8An0Dm4uFixnyOx8Put0ljUnfWq2Vz =N55i -----END PGP SIGNATURE----- --C7zPtVaVf+AK4Oqc--
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