On Thu, 18 Jul 2013 15:00:23 +0200, Simon Sandström wrote: > 2013/7/18 Jean Delvare <khali@xxxxxxxxxxxx> > > Also, the asus_atk0110 driver heavily relies on the BIOS, so a BIOS > > update may help. > > Asus P5K Premium. I'm pretty sure it has the latest BIOS version (can't > check now, see below). You can check the BIOS version of a running system, just read it from /sys/class/dmi/id/bios_version. Then compare with what Asus's website says is the latest. > I tried using the option new_if=1 and it just > screwed up all readings. For example it now shows 1.54V for all voltages, > 1500~RPM for all fans and 150°C for both CPU and MB, which is way off. OK, forget about it then. > > (...) > > For 3-pin fans, speed measurement is easy and reliable when the fan > > runs at full speed. However as soon as control is applied, measurement > > becomes harder. This is true when PWM control is used, but even more > > when DC control is used: the speed signal weakens as the voltage is > > lowered, and after some point it's difficult for the monitoring chip to > > distinguish between the speed signal and the noise. > > > > So maybe your fan is spinning at the border between readable and > > unreadable. > > Yes, I have fan control enabled both for CPU and chassi fans. I can not > disable it at the moment as the server is running some services which needs > to be up. CPU is set to automatic and the chassi fans is set to run at 70% > duty. Both chassi fans are the same model, but only one of them is giving > strange readings with lm-sensors. So I don't think there is a problem > because of the speed control. Keep in mind that the signal/noise ratio is somewhat model-specific and even varies from one fan sample to the next. > I will try to disable the fan control and also try to switch the > connectionof the two chassi fans to see if I can come up with anything. Yes, good idea. -- Jean Delvare _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
