Fan or winbond ? How can I confirm? On Jun 27, 2012, at 11:53 PM, Guenter Roeck <linux@xxxxxxxxxxxx> wrote: > On Wed, Jun 27, 2012 at 06:18:09PM -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 ? >>> >>> >> Writing 0 to pwm2 also keeps it at 1054 RPM. I'm setting pwm2_enable to 1, >> isn't that supposed to make it manual? Also, I do see a variation between >> 1054 RM and 2109 RPM (and some steps in between), when I change pwm2. I >> can't get it to spin lower than 1054 RPM though. >> > Maybe that is the lowest fan speed supported by this fan ? > > Guenter > >> thanks, >> -arun >> >> >>>> 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 >>>> Any pointers on whether it is possible to reduce fan speed further, and >>> if >>>> 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
