On Mon, 2009-08-10 at 23:53 +0200, Christian Walther wrote: > Hello list, > > 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. I tried > setting hw.acpi.thermal.polling_rate=2, but this didn't seem to work > out, too.
Your description is somewhat generic, so the best I can do under the circumstances is to give you a generic suggestion. Add something like hw.acpi.thermal.tz1.passive_cooling=1 hw.acpi.thermal.user_override=1 hw.acpi.thermal.tz1._PSV=75C to /etc/sysctl.conf and reboot. Please, note that on my laptop, relevant thermal zone is TZ1, which might or might not be the case for you -- if it is not -- change tz1 to whatever is appropriate. If this does not work, things, which are needed to help you further, include: 1. output of uname -a 2. output of sysctl hw.acpi.thermal 3. output of sysctl dev.cpu 4. output of grep powerd /etc/rc.conf 5. output of sysctl dev.acpi_ibm It would be good to have output of (#5) from several points under the load. Also, please, consider following advice on cleaning up dust and possibly re-applying the thermal paste given elsewhere in the thread -- on my 2-year old laptop doing both shaved about 3C from the normal operating temperature. HTH, -- Alexandre Kovalenko (Олександр Коваленко) _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
