On Thu, Jun 28, 2012 at 12:20:08PM -0400, Arun Raghavan wrote: > > Can you provide the output of all pwm sysfs attributes ? > > Something like "grep . /sys/class/hwmon/hwmonX/device/pwm*" should do it, > > where > > X is the hwmon index for the NCT6775F driver (probably 1 for your system). > > > > /sys/class/hwmon/hwmon1/device/pwm1:255 > /sys/class/hwmon/hwmon1/device/pwm1_enable:1 > /sys/class/hwmon/hwmon1/device/pwm1_max_output:255 > /sys/class/hwmon/hwmon1/device/pwm1_mode:1 > /sys/class/hwmon/hwmon1/device/pwm1_start_output:128 > /sys/class/hwmon/hwmon1/device/pwm1_step_output:3 > /sys/class/hwmon/hwmon1/device/pwm1_stop_output:128 > /sys/class/hwmon/hwmon1/device/pwm1_stop_time:1000 > /sys/class/hwmon/hwmon1/device/pwm1_target:41000 > /sys/class/hwmon/hwmon1/device/pwm1_tolerance:1000 > /sys/class/hwmon/hwmon1/device/pwm2:1 > /sys/class/hwmon/hwmon1/device/pwm2_enable:1 > /sys/class/hwmon/hwmon1/device/pwm2_max_output:255 > /sys/class/hwmon/hwmon1/device/pwm2_mode:1 > /sys/class/hwmon/hwmon1/device/pwm2_start_output:128 > /sys/class/hwmon/hwmon1/device/pwm2_step_output:4 > /sys/class/hwmon/hwmon1/device/pwm2_stop_output:128 > /sys/class/hwmon/hwmon1/device/pwm2_stop_time:1000 > /sys/class/hwmon/hwmon1/device/pwm2_target:44000 > /sys/class/hwmon/hwmon1/device/pwm2_tolerance:1000 > /sys/class/hwmon/hwmon1/device/pwm3:1 > /sys/class/hwmon/hwmon1/device/pwm3_enable:1 > /sys/class/hwmon/hwmon1/device/pwm3_max_output:255 > /sys/class/hwmon/hwmon1/device/pwm3_mode:1 > /sys/class/hwmon/hwmon1/device/pwm3_start_output:128 > /sys/class/hwmon/hwmon1/device/pwm3_step_output:3 > /sys/class/hwmon/hwmon1/device/pwm3_stop_output:128 > /sys/class/hwmon/hwmon1/device/pwm3_stop_time:1000 > /sys/class/hwmon/hwmon1/device/pwm3_target:41000 > /sys/class/hwmon/hwmon1/device/pwm3_tolerance:1000 > Hi Arun, is that the default setting after system powerup, or did you modify it ? Just wondering, since the NCT6775 is usually configured for automatic fan control (which, in my experience, works pretty well). Anyway, the fans are all in pwm mode, so I think Jean is right and the fan just doesn't get slower than 1000 rpm. Which may explain why one of the fans in my system runs at 1000 rpm, even though it turns out that its pwm value is lower than the other fan's pwm value. For comparison, here is the output for pwm1 on my system with NCT6775. /sys/class/hwmon/hwmon1/device/pwm1:64 /sys/class/hwmon/hwmon1/device/pwm1_auto_point1_pwm:50 /sys/class/hwmon/hwmon1/device/pwm1_auto_point1_temp:5000 /sys/class/hwmon/hwmon1/device/pwm1_auto_point1_temp_hyst:3000 /sys/class/hwmon/hwmon1/device/pwm1_auto_point2_pwm:77 /sys/class/hwmon/hwmon1/device/pwm1_auto_point2_temp:89000 /sys/class/hwmon/hwmon1/device/pwm1_auto_point2_temp_hyst:87000 /sys/class/hwmon/hwmon1/device/pwm1_auto_point3_pwm:77 /sys/class/hwmon/hwmon1/device/pwm1_auto_point3_temp:89000 /sys/class/hwmon/hwmon1/device/pwm1_auto_point3_temp_hyst:87000 /sys/class/hwmon/hwmon1/device/pwm1_auto_point4_pwm:123 /sys/class/hwmon/hwmon1/device/pwm1_auto_point4_temp:98000 /sys/class/hwmon/hwmon1/device/pwm1_auto_point4_temp_hyst:96000 /sys/class/hwmon/hwmon1/device/pwm1_auto_point5_pwm:166 /sys/class/hwmon/hwmon1/device/pwm1_auto_point5_temp:101000 /sys/class/hwmon/hwmon1/device/pwm1_auto_point5_temp_hyst:99000 /sys/class/hwmon/hwmon1/device/pwm1_auto_point6_pwm:255 /sys/class/hwmon/hwmon1/device/pwm1_auto_point6_temp:104000 /sys/class/hwmon/hwmon1/device/pwm1_auto_point6_temp_hyst:102000 /sys/class/hwmon/hwmon1/device/pwm1_auto_point7_pwm:255 /sys/class/hwmon/hwmon1/device/pwm1_auto_point7_temp:114000 /sys/class/hwmon/hwmon1/device/pwm1_auto_point7_temp_hyst:114000 /sys/class/hwmon/hwmon1/device/pwm1_enable:5 /sys/class/hwmon/hwmon1/device/pwm1_max_output:255 /sys/class/hwmon/hwmon1/device/pwm1_mode:1 /sys/class/hwmon/hwmon1/device/pwm1_start_output:1 /sys/class/hwmon/hwmon1/device/pwm1_step_down_time:100 /sys/class/hwmon/hwmon1/device/pwm1_step_enable:1 /sys/class/hwmon/hwmon1/device/pwm1_step_output:1 /sys/class/hwmon/hwmon1/device/pwm1_step_up_time:200 /sys/class/hwmon/hwmon1/device/pwm1_stop_output:1 /sys/class/hwmon/hwmon1/device/pwm1_stop_output_enable:0 /sys/class/hwmon/hwmon1/device/pwm1_stop_time:6000 /sys/class/hwmon/hwmon1/device/pwm1_target:1000 /sys/class/hwmon/hwmon1/device/pwm1_temp_sel:8 /sys/class/hwmon/hwmon1/device/pwm1_weight_duty_step:36 /sys/class/hwmon/hwmon1/device/pwm1_weight_enable:1 /sys/class/hwmon/hwmon1/device/pwm1_weight_temp_sel:1 /sys/class/hwmon/hwmon1/device/pwm1_weight_temp_step:2000 /sys/class/hwmon/hwmon1/device/pwm1_weight_temp_step_base:70000 /sys/class/hwmon/hwmon1/device/pwm1_weight_temp_step_tol:1000 This is with the new driver for the NCT677X chips, which supports automatic fan control. Might be worthwhile to give it a try if you want to use automatic fan control. Thanks, Guenter _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
