Modern 4-pin fans can have a minimum speed (PWM=0) which is still relatively high. I've seen 4500 RPM fans lower their speed to only 3500 RPM, which is 77% of the maximum speed, above our current detection threshold (3/4 or 75%). Increase the threshold to 5/6 (roughly 83%) to make sure such fans are handled properly. Signed-off-by: Jean Delvare <jdelvare@xxxxxxx> --- prog/pwm/pwmconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- lm-sensors.orig/prog/pwm/pwmconfig 2021-02-11 11:31:40.636126815 +0100 +++ lm-sensors/prog/pwm/pwmconfig 2021-02-11 15:30:12.831007617 +0100 @@ -455,7 +455,7 @@ do OS=$(echo $SPEEDS | cut -d' ' -f$count) S=$(echo $CURRENT_SPEEDS | cut -d' ' -f$count) echo " $j ... speed was $OS now $S" - let threshold=3*$OS/4 + let threshold=5*$OS/6 if [ $S -lt $threshold ] then echo " It appears that fan $j" -- Jean Delvare SUSE L3 Support
