Hi Yonkui, -is this a 3 or 4 pin fan? -is this a 3 or 4 pin connector on MB? when you operate pwm1 manually, - can you see the value with cat pwm1 you did write ther before? - are you sure to be in manual mode pwm_enable=1 ? - what do the other pwm1* register read? Christian Am Samstag, 4. November 2006 04:34 schrieb Yongkui Han: > HI, > > Could anybody help me with this, or point me to somewhere? > > Thanks! > > Thanks. > Yongkui > > On 10/30/06, Yongkui Han <hanyongkui99 at gmail.com> wrote: > > Hi All, > > > > I just found the following information on page 43 of the motherboard > > manual. > > ftp://download.intel.com/design/motherbd/mv/A6514501.pdf > > > > -------------------------- > > 1.14.2.2 Fan Connectors > > The D850MD and D850MV boards have two fan connectors with thermal control > > signals (fan 1 > > and fan 2) that are used to switch the fans on and off as determined by > > the thermal sensors. > > The ambient temperature of a D850MD- or D850MV-based system is thermally > > monitored by > > separate temperature sensors that control voltage to the fan 1 and fan 2 > > connectors. If the fans > > attached to these connectors provide a tachometer signal, the sensor > > reports the fan speed to the hardware monitor component. > > The temperature sensors that control the fans are initialized by the BIOS > > at power-up to turn on only when the sensor reaches 36 oC (96.8 oF). The > > fans switch off when their respective sensors cool down to 31 oC > > (87.8oF). This prevents the fans from turning off and on when the ambient > > air around the sensor fluctuates around 35???36 oC. When the fans switch > > on, they may appear to rotate slowly because the fan's duty cycle starts > > at 70 percent and rises to 100 percent when the sensor reaches 46 oC ( > > 114.8oF). Table 12 summarizes the functions of the four fan connectors. > > Table 12. Fan Connector Descriptions > > > > Feature Processor Fan Fan 1 > > Fan 2 Fan 3 > > +12 V DC connection Yes Yes > > Yes Yes > > Tachometer output Yes > > No Yes No > > Controllable No > > Yes Yes Yes > > ---------------------------- > > > > In the Table 12, It says the Processor Fan is not controllable, although > > the other fans are controllable. > > > > So this means that I cannot control the CPU fan speed. But it seems that > > we could do some tricks to make the system think the thermal sensor is > > higher than 46C. Then the CPU fan speed should run at full speed. Then > > this is what I want, a fixed CPU fan speed. > > > > Any suggestions? > > > > Thanks! > > Yongkui > > > > On 10/30/06, Yongkui Han <hanyongkui99 at gmail.com > wrote: > > > Hi All, > > > > > > I am trying to control the speed of the CPU fan. I would like to set > > > constant CPU fan spee d. > > > > > > My CPU fan is Intel Fan & Heatsink A65061-001, with 3 wires, green, > > > yellow, and black. > > > > > > I run pwmconfig to see /sys/bus/i2c/devices/9191-0800/pwm1 is > > > controling fan1_input, which is the CPU fan, and saved the default > > > configuration into /etc/fancontrol file. The pwmconfig command didn't > > > report any errors but I noticed that when it reports the CPU fan speed > > > of 0, the CPU fan is actually still running. Also, the GNUPLOT graph of > > > the correlation between PWM and Fan Speed is very strange. The fan > > > speed are 3233 for all PWM values 2--255, and the fan speed is 0 for > > > PWM=0. This is very weird. The pdf file pwmtest.pdf is enclosed for > > > your reference. > > > > > > Then I run fancontrol command. the command is running correctly without > > > reporting errors. Now the sensors command will only report a fan speed > > > of 0 RPM. But the problem is the CPU fan is still running, it never > > > stops at all. > > > > > > > > > I also tried not to use fancontrol. I use the command: echo 64 > > > > /sys/bus/i2c/devices/9191-0800/pwm1, but still this had no effect on > > > the CPU fan speed. > > > > > > Could some one help me with the CPU fan speed control? > > > > > > Thanks! > > > > > > BTW, > > > I have an Intel D850MV motherboard. There is an ADM1025A sensor chip on > > > the motherboard. Also there is an LPC47M142-NC Super I/O chip on the > > > motherboard. My CPU is a Pentium 4 CPU, 1.7GHz. > > > > > > The following is a sample output for my lm-sensors software. > > > --------------------------------- > > > $ sensors > > > adm1025-i2c-0-2d > > > Adapter: SMBus I801 adapter at efa0 > > > > > > +2.5V: +2.49 V (min = +2.25 V, max = +2.75 V) > > > VCore: +1.68 V (min = +1.66 V, max = +1.84 V) > > > +3.3V: +3.30 V (min = +2.97 V, max = +3.63 V) > > > +5V: +5.13 V (min = +4.50 V, max = +5.50 V) > > > VCC: +3.30 V (min = +2.97 V, max = +3.63 V) > > > CPU Temp: +35.0??C (low = +10??C, high = +60??C) > > > M/B Temp: +34.0??C (low = +10??C, high = +45??C) > > > vid: +1.750 V (VRM Version 9.0) > > > > > > smsc47m1-isa-0800 > > > Adapter: ISA adapter > > > fan1: 3233 RPM (min = 640 RPM, div = 8) > > > fan2: 0 RPM (min = 640 RPM, div = 8) > > > -------------------------------------------------------------- > > > > > > > > > Regards, > > > Yongkui ___________________________________________________________ Der fr?he Vogel f?ngt den Wurm. 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