On 04/15/2011 12:59 AM, Jean Delvare wrote: > On Thu, 14 Apr 2011 22:30:53 -0700, Darren Hart wrote: >> After trying a different kernel, I was able to get reading from the >> w83795 again. I applied the fan to the chipset until it reached it's >> lowest point (52.5C while idle). I then positioned the fan away from the >> chipset and watched the temperature rise until it reached 84.5C and the >> fans sped up to > 4000RPM. >> >> FAN 1 | 2401.000 | RPM | ok | 400.000 | 576.000 >> | 784.000 | 33856.000 | 34225.000 | 34596.000 >> FAN 2 | 0.000 | RPM | nr | 400.000 | 576.000 >> | 784.000 | 33856.000 | 34225.000 | 34596.000 >> FAN 3 | 2401.000 | RPM | ok | 400.000 | 576.000 >> | 784.000 | 33856.000 | 34225.000 | 34596.000 >> FAN 4 | 4356.000 | RPM | ok | 400.000 | 576.000 >> | 784.000 | 33856.000 | 34225.000 | 34596.000 >> FAN 5 | 3969.000 | RPM | ok | 400.000 | 576.000 >> | 784.000 | 33856.000 | 34225.000 | 34596.000 >> >> >> Given that the system is idle, and Super Mictro stated the chipset >> should not exceed 75C, and I have no obstructions in the case and no >> expansion boards to add heat, something appears to be wrong. >> >> Here is an annotated log of the experiment, one reading every 10 seconds: >> >> dvhart@rage:~$ while true; do sensors w83795g-i2c-0-2f | grep temp1; >> sleep 10; done >> temp1: +61.2°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +59.0°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +57.5°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +56.0°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +55.0°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +54.0°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +53.0°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +52.5°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +52.5°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +53.0°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +55.0°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +56.5°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +58.5°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +60.2°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +61.8°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +63.2°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +64.2°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +65.8°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +66.8°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +67.8°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +68.8°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +69.8°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +70.8°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +71.2°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +72.2°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +72.8°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +73.8°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +74.5°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +75.0°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +75.5°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +76.0°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +77.0°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +77.5°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +77.5°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +78.0°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +78.5°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +79.0°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +79.0°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +79.5°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +80.8°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +80.8°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +80.5°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +81.0°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +81.0°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +81.5°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +81.5°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +82.0°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +82.0°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +82.0°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +82.5°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +82.5°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +83.0°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +83.0°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +83.0°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +83.0°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +83.5°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +83.5°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +83.5°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +83.5°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +84.0°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +84.0°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +84.0°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +84.5°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +84.5°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +84.5°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +84.5°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +84.5°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +84.5°C (high = +127.0°C, hyst = +127.0°C) >> >> Fan speed jumped up at this point: >> >> FAN 1 | 2401.000 | RPM | ok | 400.000 | 576.000 >> | 784.000 | 33856.000 | 34225.000 | 34596.000 >> FAN 2 | 0.000 | RPM | nr | 400.000 | 576.000 >> | 784.000 | 33856.000 | 34225.000 | 34596.000 >> FAN 3 | 2401.000 | RPM | ok | 400.000 | 576.000 >> | 784.000 | 33856.000 | 34225.000 | 34596.000 >> FAN 4 | 4356.000 | RPM | ok | 400.000 | 576.000 >> | 784.000 | 33856.000 | 34225.000 | 34596.000 >> FAN 5 | 3969.000 | RPM | ok | 400.000 | 576.000 >> | 784.000 | 33856.000 | 34225.000 | 34596.000 >> >> And stayed at high speed until: >> >> temp1: +79.2°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +79.8°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +79.0°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +79.5°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +80.0°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +80.5°C (high = +127.0°C, hyst = +127.0°C) >> temp1: +81.0°C (high = +127.0°C, hyst = +127.0°C) >> >> And sped up again here. >> And so on. > > The W83795ADG can be programmed to switch fans to full speed when > certain temperature limits are exceeded. The driver doesn't currently > expose these settings, but my guess is that's what you're seeing. > According to the datasheet, the default value for temperature limit > registers for this mechanism is 0x50, that is... 80°C. Which is consistent with Super Micro saying the chipset must remain below 75C. A fan brings it down 30C. I'm looking into adding a fan or replacing the heat sink, or both. With that, I'll be giving up on fancontrol for this machine - since it behaves itself just fine when the chipset isn't overheating. -- Darren Hart Intel Open Source Technology Center Yocto Project - Linux Kernel _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
