Perhaps I'm missing something obvious or simple, but I always get fan RPM of zero from lm sensors and can't seem to debug it. Thanks in advance for developing support for the nct6775f. Here's my setup: Intel DH57DD board with core i5-750 cpu bios JGIBX10J.86A 1219.2132 (bios date 12/19/2010) 3 4-pin fans plugged into the motherboard bios setup reports positive fan rpm values that seem reasonable at least one of the fans runs very fast after a reset for a second or so, then they all slow down to < 1000 rpm. Even under heavy CPU load, the fans don't seem to speed up much if at all, but the system is pretty well vented and doesn't overheat. Kernel module installed from http://roeck-us.net/linux/drivers/w83627ehf on 2011/04/04 and manually built and installed using that Makefile. kernel 2.6.32-5-amd64 (Debian 2.6.32-31) Debian squeeze sensors version 3.1.2 with libsensors version 3.1.2 No overrides set when loading the module (just "modprobe w83627ehf"). No overrides for nct6775 in /etc/sensors3.conf. On previous versions of the driver which did not support nct6775f, I used force_id=0xa510 to get some temperature value output. But all fan RPMs were zero using that module and id value too. Since the fan divisor is read-only now, I have not been able to change it. It is already 128 anyway--see below. output of "sensors" $ sensors coretemp-isa-0000 Adapter: ISA adapter Core 0: +32.0°C (high = +84.0°C, crit = +100.0°C) coretemp-isa-0001 Adapter: ISA adapter Core 1: +29.0°C (high = +84.0°C, crit = +100.0°C) coretemp-isa-0002 Adapter: ISA adapter Core 2: +33.0°C (high = +84.0°C, crit = +100.0°C) coretemp-isa-0003 Adapter: ISA adapter Core 3: +30.0°C (high = +84.0°C, crit = +100.0°C) nct6775-isa-0680 Adapter: ISA adapter in0: +0.87 V (min = +0.00 V, max = +1.74 V) in1: +0.77 V (min = +0.00 V, max = +0.00 V) ALARM in2: +3.34 V (min = +0.00 V, max = +0.00 V) ALARM in3: +3.34 V (min = +0.00 V, max = +0.00 V) ALARM in4: +1.26 V (min = +0.00 V, max = +0.00 V) ALARM in5: +0.75 V (min = +0.00 V, max = +0.00 V) ALARM in6: +1.06 V (min = +0.00 V, max = +0.00 V) ALARM in7: +3.30 V (min = +0.00 V, max = +0.00 V) ALARM in8: +3.26 V (min = +0.00 V, max = +0.00 V) ALARM fan1: 0 RPM (min = 0 RPM, div = 128) ALARM fan2: 0 RPM (min = 0 RPM, div = 128) ALARM fan3: 0 RPM (min = 0 RPM, div = 128) ALARM fan4: 0 RPM (div = 128) ALARM SYSTIN: +31.0°C (high = +0.0°C, hyst = +0.0°C) ALARM sensor = diode CPUTIN: +45.0°C (high = +80.0°C, hyst = +75.0°C) sensor = diode AUXTIN: +23.0°C (high = +80.0°C, hyst = +75.0°C) sensor = thermistor cpu0_vid: +1.500 V Output of pwmconfig:# pwmconfig # pwmconfig revision 5770 (2009-09-16) This program will search your sensors for pulse width modulation (pwm) controls, and test each one to see if it controls a fan on your motherboard. Note that many motherboards do not have pwm circuitry installed, even if your sensor chip supports pwm. We will attempt to briefly stop each fan using the pwm controls. The program will attempt to restore each fan to full speed after testing. However, it is ** very important ** that you physically verify that the fans have been to full speed after the program has completed. Found the following devices: hwmon0/device is coretemp hwmon1/device is coretemp hwmon2/device is coretemp hwmon3/device is coretemp hwmon4/device is nct6775 Found the following PWM controls: hwmon4/device/pwm1 hwmon4/device/pwm2 hwmon4/device/pwm3 Giving the fans some time to reach full speed... Found the following fan sensors: hwmon4/device/fan1_input current speed: 0 ... skipping! hwmon4/device/fan2_input current speed: 0 ... skipping! hwmon4/device/fan3_input current speed: 0 ... skipping! hwmon4/device/fan4_input current speed: 0 ... skipping! I can manually write "0" or "1" to /sys/devices/platform/w83627ehf.1664/pwm1_mode, but it has no effect on anything. pwm[1-3] all have value 255. Any thoughts or other info I can provide? Thanks. __________________________________________________________________ Michael D. Powell _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors