Hi Michel, For the future, please keep the lm-sensors list in the loop so that others can profit from the information. On Dec 19, 2007 6:07 AM, Michel Lespinasse <walken at zoy.org> wrote: > Hi Juerg, > > I'm using the dme1737 driver with an asus p1-ah2 barebones system. > A believe it's using an asus A8000 chip, I have not double checked > that though. But the driver seems to work quite nicely, thanks ! You're welcome, I'm glad people like it :-) > There is however a small detail I could not manage to get working: > I can't get the CPU fan (pwm1) to go off when the temps are low enough. > All 3 pwm*_auto_pwm_min values always stay equal to their corresponding > pwm*_auto_point1_pwm value, even if I try to write 0 to the pwm*_auto_pwm_min > value. Is this a hardware limitation (i.e. nonwritable bit) on the asus chip ? > Is there anything I could do to help figure out the issue ? Well yes, I've seen issues with this as well. I couldn't get it to work on my machine (P1-AH2) as described in the datasheet of the dme1737. Don't know if it's a chip or driver bug. Anyways, here is how it's supposed to work: Mode 1) In this mode, the fan will be on all time with PWM between auto_point1_pwm and auto_point2_pwm (which is hard-wired to 255, i.e. 100%) depending on the corresponding temp values. To set the chip up in this mode, do the following: echo <LOW_TEMP> > XXX_auto_point1_temp echo <FULL_TEMP> > XXX_auto_point2_temp echo <MIN_PWM> > XXX_auto_point1_pwm echo <MIN_PWM> > XXX_auto_pwm_min Mode 2) This mode is like mode 1) except that the fan will turn off if the associated temp goes below the auto_point1_temp_hyst value. I believe this is what you want and this is what I couldn't get to work :-) Anyways, please give it a try. To set the chip up in this mode, do this: echo <MIN_TEMP> > XXX_auto_point1_temp_hyst echo <LOW_TEMP> > XXX_auto_point1_temp echo <MAX_TEMP> > XXX_auto_point2_temp echo <MIN_PWM> > XXX_auto_point1_pwm echo 0 > XXX_auto_pwm_min After you set the chip up, please run 'grep "" /sys/class/hwmon/hwmon*/device/*' and post the output to the list. ....juerg > Cheers, > > -- > Michel Lespinasse >
