I need to get fairly fine grain control on my CPU fan speed for some experiments, but I am currently unable to set the fan speed below 1054 RPM. pwmconfig confirms the same across the divisor range. Processor is i7-2600, motherboard
I tried setting pwm2_enable to 1 and pwm2 to 1 manually and I see that the fan speed varies but the min RPM remains 1054. Info below.
Any pointers on whether it is possible to reduce fan speed further, and if so how would be very helpful.
thanks,
-arun
root@sandy:/sys/devices/platform/w83627ehf.656# echo 255 > pwm2
root@sandy:/sys/devices/platform/w83627ehf.656# sensors
coretemp-isa-0000
Adapter: ISA adapter
Physical id 0: +46.0°C (high = +78.0°C, crit = +98.0°C) ALARM (CRIT)
Core 0: +46.0°C (high = +78.0°C, crit = +98.0°C) ALARM (CRIT)
nct6775-isa-0290
Adapter: ISA adapter
Vcore: +0.82 V (min = +0.00 V, max = +1.74 V)
in1: +1.12 V (min = +0.00 V, max = +0.00 V) ALARM
AVCC: +3.46 V (min = +2.98 V, max = +3.63 V)
+3.3V: +3.46 V (min = +2.98 V, max = +3.63 V)
in4: +1.06 V (min = +0.00 V, max = +0.00 V) ALARM
in5: +1.05 V (min = +0.00 V, max = +0.00 V) ALARM
in6: +1.08 V (min = +0.00 V, max = +0.00 V) ALARM
3VSB: +3.41 V (min = +2.98 V, max = +3.63 V)
Vbat: +3.34 V (min = +2.70 V, max = +3.30 V) ALARM
fan1: 0 RPM (min = 0 RPM, div = 128)
fan2: 2109 RPM (min = 0 RPM, div = 128) ALARM <----
fan3: 0 RPM (min = 0 RPM, div = 128)
fan4: 0 RPM (div = 128)
SYSTIN: +31.0°C (high = +0.0°C, hyst = +0.0°C) ALARM sensor = CPU diode
CPUTIN: +29.5°C (high = +80.0°C, hyst = +75.0°C) sensor = CPU diode
AUXTIN: +22.0°C (high = +80.0°C, hyst = +75.0°C) sensor = thermistor
PECI Agent 0: +45.5°C
cpu0_vid: +2.050 V
intrusion0: OK
root@sandy:/sys/devices/platform/w83627ehf.656# echo 1 > pwm2
root@sandy:/sys/devices/platform/w83627ehf.656# sensors
coretemp-isa-0000
Adapter: ISA adapter
Physical id 0: +46.0°C (high = +78.0°C, crit = +98.0°C) ALARM (CRIT)
Core 0: +46.0°C (high = +78.0°C, crit = +98.0°C) ALARM (CRIT)
nct6775-isa-0290
Adapter: ISA adapter
Vcore: +0.85 V (min = +0.00 V, max = +1.74 V)
in1: +1.12 V (min = +0.00 V, max = +0.00 V) ALARM
AVCC: +3.46 V (min = +2.98 V, max = +3.63 V)
+3.3V: +3.46 V (min = +2.98 V, max = +3.63 V)
in4: +1.06 V (min = +0.00 V, max = +0.00 V) ALARM
in5: +1.05 V (min = +0.00 V, max = +0.00 V) ALARM
in6: +1.08 V (min = +0.00 V, max = +0.00 V) ALARM
3VSB: +3.41 V (min = +2.98 V, max = +3.63 V)
Vbat: +3.34 V (min = +2.70 V, max = +3.30 V) ALARM
fan1: 0 RPM (min = 0 RPM, div = 128)
fan2: 1054 RPM (min = 0 RPM, div = 128) ALARM
fan3: 0 RPM (min = 0 RPM, div = 128)
fan4: 0 RPM (div = 128)
SYSTIN: +30.0°C (high = +0.0°C, hyst = +0.0°C) ALARM sensor = CPU diode
CPUTIN: +29.5°C (high = +80.0°C, hyst = +75.0°C) sensor = CPU diode
AUXTIN: +22.0°C (high = +80.0°C, hyst = +75.0°C) sensor = thermistor
PECI Agent 0: +44.5°C
cpu0_vid: +2.050 V
intrusion0: OK
_______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
