Hi Adam, On Thu, 18 Apr 2013 10:50:01 -0400, Adam Rosi-Kessel wrote: > Apologies as this a bit OT, but hoping someone can help me understand > what's happening here. It does appear that the Inspiron has a 3-pin > connector. When I power up the box, it is very quiet for about 4 or 5 > minutes. After that, the fan appears to go to 100% and never quiets down > again. Even when I cpufreq-set to powersave and cap the max CPU freq at > 2.0 GHz for all four cores (80% of max), it still stays loud > indefinitely. What does "top" say about the system load? Cpufreq makes no difference if there is CPU load. > I've opened up the box and cleaned out all dust and > visually inspected the fans, and nothing appears awry. > /sys/devices/virtual/thermal/thermal_zone0/temp consistently reports > 40.0 degrees C i.e. 40000 (I'm actually suspicious of that number > because it never seems to change). It is completely possible that the returned value is bogus, we've seen that before. Sometimes fixed by a BIOS update, sometimes not. Another possibility is that the measurement is so inaccurate below 40°C that they don't want to report it and you'll only see the value raise if the temperature actually goes above 40°C. Don't you have any other thermal sensor in the system than the ACPI thermal zone? Did you try running sensors-detect already? A recent version preferably: http://dl.lm-sensors.org/lm-sensors/files/sensors-detect Do you have any /sys/class/thermal/cooling_device* with attribute type other than Processor? > Any ideas for what I can do to > troubleshoot why the fan is always running at full blast? Do you have any reason to believe that the fan speed can be controlled? Does it behave better under a different OS? Do you see any option in the BIOS to control the thermal and/or acoustic profile? Try playing with these if they exist. -- Jean Delvare _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
