Dear lm-sensors list, Please may I ask for a bit of technical support (the problem I'm experiencing may be the result of a bug but I'm not sure... it might also be me being an idiot!) I am using lm-sensors and coretemp on an HP ProBook 6450b laptop with an Intel i5 quad-core CPU. I'm running Ubuntu 12.04 with all the latest updates: $ uname -a Linux probook 3.2.0-31-generic #50-Ubuntu SMP Fri Sep 7 16:16:45 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux The CPU fan is off when the system is idling. When I stress the system the fan starts running when the CPU gets to 105 degrees C (which seems rather high but never mind...). The problem is that the system appears to be failing to provide a constant current to the fan. Instead the fan is being turned on and off very rapidly which results in a "clicking" noise which sounds a little like a hard disk seeking. I have manually measured the voltage supplied to the fan and it does indeed turn on and off rapidly. I wonder if this problem could be fixed by enabling a hysteresis setting in coretemp? This "clicking fan" problem does not occur if I run Windows7 or if I boot Linux using apci=off. Alternatively, is there a way for me to manually set the max and crit temperatures for my CPU? I've tried sudo bash -c "echo 90000 > /sys/class/hwmon/hwmon1/device/temp2_max" But I get a "permission denied" error. I've also tried adding "set temp2_max 90000" to sensors3.conf but I get a "Failed to set value" error. Any help would be wonderful! Many thanks, Jack _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
