On Wed, Jun 27, 2012 at 02:28:34PM -0400, Arun Raghavan wrote: > Hi, > > 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. > What happens if you write 0 into pwmX ? Also, did you select manual fan speed control ? Thanks, Guenter > 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 _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
