On Thu, Jun 28, 2012 at 12:00:56AM +0100, Michael Zintakis wrote: > Hello Guenter and All, > [ .. ] > One last question (though this is more specific to the f71882fg > driver): I have a procfs file called "pwmX_auto_pointY" (Y being Do you mean sysfs ? > from 1-5), which indicates the various pwm current value which is to > be applied for different points: 4 being when the controlling > temperature is low (the value of pwmX_auto_point4_temp to be > precise) and 1 being where the current is at its maximum - normally > 255. > > Now, what is the purpose of pwmX_auto_point5 - does this hold the > pwm value where the fan is in an idle state (i.e. the temperature is > below pwmX_auto_point4_temp)? Because on all 3 fans, I have this set > to 1, which, I am assuming is when the fans are stopped. > Correct. 1 is too low, though. Default value per datasheet is 0x80. Whatever it is, it should be high enough for the fans to start spinning. The F71882FG does not have a register to set a "start spinning" pwm value, so your minimum must guarantee that the fans do start to spin. What is your setting for pwmX_enable ? It should probably be set to automatic(2) so the chip can automatically control the fan speed depending on the temperature. > Even if I bring this value to some "idle" current, that won't help > much because when I first boot the system, the fans are *always* > still, so even if the idle state is >1, that won't help me much, so > there must be another - better - way than using a script to > "kickstart" the fans initially, surely! > Maybe fan control is not set to automatic by the BIOS ? Guenter -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
