the first is the speed 0-255 and the second is the enable 0|1. After writing a 1 to the second value you should be able to change the first value in subsequent writes. You can also try the program prog/pwm/pwmconfig and see if that works. If it does you can try prog/pwm/fancontrol. If things don't work let us know. Rene Mayrhofer wrote: > > Dear lm-sensors folks, dear Mark, > > I own a VIA EPIA M-6000 mainboard, whose hardware sensors are supported > since lm-sensors 2.8.0 (vt1211) - the version I'm currently using. > Although I still have to find a formula to get correct CPU temperature > readings, accessing the sensor values works without a problem (I > suspected lm-sensors to be the source of some random crashes, but can > now rule that out). > Maybe it is a stupid question, but does the vt1211 kernel module also > support writing to the chip registers ? During my quick skim through the > source code, it appears that it should. But when I try to write values > to /proc/sys/dev/sensors/vt1211-isa-6000/pwm1 (which reads 255 0), only > the second value can be modified. After writing something there, it > always reads 255 (0|1). Maybe I am doing something completely wrong > here, but the feature list of the vt1211 says that it is able to control > the speed of the connected fans in 256 steps, so (from parsing through > the source) I figured that pwm* would be the variables to change. Is > that supported ? Should changing pwm* work and really change the fan > speeds ? If not, how can I make that happen (supposing that the vt1211 > fan speed control output are connected on the EPIA, but since it's also > from VIA itself, that seems likely) ? I am willing to play with the chip > if VIA is willing to provide a data sheet - some Windows tools like > Speedfan claim that they are able to control fan speeds on a vt1211.prog > However, I would need some pointers how to do that within the lm-sensors > codes since I've never really looked at them in detail. > > with best regards, > Rene
