Chuan-kai Lin wrote: > On Mon, Dec 15, 2008 at 04:32:09PM +0100, Hans de Goede wrote: >> I got your email address from Jean Delvare. I'm the f71882fg maintainer >> and I've been working on adding f8000 support to the f71882fg driver. >> That work is now finished. > > Hi Hans, > > Thank you for your great work! The module builds and loads fine in > 2.6.27.8 on my Dell Studio Slim 540s desktop computer, and sensors shows > fan speed, voltage, and temperature measurements. Very cool!! I have > attached two files showing the driver in action: > > idle.txt - sysfs contents on an idle system right after bootup > loaded.txt - sysfs contents + sensors output on a loaded system > > Here are some issues I found: > > 1. There are only two fans in my system. The driver reports 0 RPM for > the third fan (which sounds right), and some absurdly high RPM for > the fourth fan (which sounds wrong). > Okay, well the IC can measure up to 4 fans, so 4 will be reported, one can disable them in /etc/sensors.conf . > 2. When the driver loads into the kernel, it reports that there are > three fans, and they are all in duty-cycle mode. However, only the > CPU fan (fan2) uses a 4-pin connector; the case fan (fan1) uses a > 3-pin connector. I seem to recall that a fan on a 3-pin connector > can be controlled through only DC voltage? > 4 pins fans allow more accurate fan speed measurement when controlled with pwm, but 3 pin pans can be controlled with pwm too. > 3. The full-speed number seems to record the maximum measured fan speed > instead of the maximum possible fan speed. > So this gets updated by hardware? This is not mentioned anywhere in the dcos, but if that is the case that would be good! > 4. I cannot change fan speed by altering tempX_auto_pointY_pwm values. > However, both the CPU fan and the case fan do speed up when the > system gets warm. what does cat pwmX_enable give you, if it gives 3, the relevant pwm is in thermostat mode see the documentation I also attached. Regards, Hans
