> Date: Fri, 15 Apr 2016 20:41:53 +0200
> From: Marcus Glocker <mar...@nazgul.ch>
>
> Yesterday I've installed macppc -current on a G5.
> Since OF_getprop() for the 'unmanage-value' parameter fails on it,
> smu(4) sets the fan speed to 'max-value' instead, which is 3200RPM
> in my case. This makes the G5 sound louder than my vacuum cleaner.
>
> First I thought 'unmanage-value' is a typo and it should be
> 'unmanaged-value' like in the FreeBSD driver, but unfortunately it
> still did fail. I saw that the FreeBSD driver doesn't set the fan
> speed at all initially in their driver. When I do the same on the
> G5, the fan speed goes to a decent of ~1000RPM:
>
> hw.sensors.smu0.fan0=999 RPM (Rear Fan 0)
> hw.sensors.smu0.fan1=999 RPM (Rear fan 1)
> hw.sensors.smu0.fan2=999 RPM (Front Fan)
>
> I don't know what the right way is to fix this, but skipping to set
> the fan speed when the 'unmanage-value' isn't available seems to work
> fine in this case.
On what hardware are you running this?
Can you send us the output of eeprom -p for this machine?
> Index: sys/arch/macppc/dev/smu.c
> ===================================================================
> RCS file: /cvs/src/sys/arch/macppc/dev/smu.c,v
> retrieving revision 1.27
> diff -u -p -u -p -r1.27 smu.c
> --- sys/arch/macppc/dev/smu.c 4 Jun 2015 18:01:44 -0000 1.27
> +++ sys/arch/macppc/dev/smu.c 15 Apr 2016 18:17:12 -0000
> @@ -281,15 +281,17 @@ smu_attach(struct device *parent, struct
> val = 0xffff;
> fan->max_rpm = val;
> if (OF_getprop(node, "unmanage-value", &val, sizeof val) <= 0)
> - val = fan->max_rpm;
> + val = 0;
> fan->unmanaged_rpm = val;
>
> if (OF_getprop(node, "location", loc, sizeof loc) <= 0)
> strlcpy(loc, "Unknown", sizeof loc);
> strlcpy(fan->sensor.desc, loc, sizeof sensor->sensor.desc);
>
> - /* Start running fans at their "unmanaged" speed. */
> - smu_fan_set_rpm(sc, fan, fan->unmanaged_rpm);
> + if (fan->unmanaged_rpm) {
> + /* Start running fans at their "unmanaged" speed. */
> + smu_fan_set_rpm(sc, fan, fan->unmanaged_rpm);
> + }
>
> #ifndef SMALL_KERNEL
> sensor_attach(&sc->sc_sensordev, &fan->sensor);
>
>
