On 11/3/11, Guenter Roeck <guenter.roeck@xxxxxxxxxxxx> wrote: > On Thu, 2011-11-03 at 12:43 -0400, Jean Delvare wrote: >> On Thu, 3 Nov 2011 08:32:02 -0700, Guenter Roeck wrote: >> > On Thu, 2011-11-03 at 11:19 -0400, Lars Noodén wrote: >> > > I can set the fan speed manually. e.g.: >> > > >> > > echo 3500 > /sys/class/hwmon/hwmon0/device/fan1_output >> > > >> > > That helps some. >> > > >> > If you can do that, you should be able to set up fancontrol to >> > automatically control fan speed based on system temperatures. >> >> This won't work, as fancontrol wants pwmX attributes which the applesmc >> driver doesn't implement. >> > Yes, you are right - it won't work without patching it to use > fanX_output and to accept larger values for the limits. > > Wonder how this works for other Apple systems. Maybe there is an > Apple-specific script out there to control fan speed. > >> > There is another sysfs attribute - fanX_manual. I don't find driver >> > documentation, so I have no idea what it is doing. The name indicates >> > that it might set manual vs. automatic fan control. What is it set to in >> > your system ? From the code, looks like it should be 0 or 1. Try to >> > toggle it and see what happens - after all, it can not get worse ;). >> >> Might be worth looking at files fanX_min, _max and _safe too. Too bad >> there doesn't seem to be any documentation available for all these >> non-standard attributes :( >> > Here is some info from the web about the problem. See > http://ubuntuforums.org/archive/index.php/t-981280.html. > > So, for those that have reported high temperatures due to low fan > speeds: check the value of > > cat /sys/devices/platform/applesmc.768/fan1_manual It is zero already: $ cat /sys/devices/platform/applesmc.768/fan1_manual 0 /Lars > With no software control of the fans, which is the case with the > macbooks (fancontrol and pwmconfig does not work), the fan speed seems > to be controlled automatically by the SMC without issues - but only if > fan1_manual is zero. > > Guenter > > > _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
