On 2013-04-18 16:50, Adam Rosi-Kessel wrote:
On 3/16/2013 6:59 PM, Guenter Roeck wrote:
> > >>Sorry -- typo above. It should say I can control*CPU* fans, but can't
> > >>find any documentation as to how to control the*chassis* fan.
> > >On my motherboard, all fan headers have 4 pins, but there is a jumper
> > >to tell the board to treat the case fan headers as 3-pin. This is
> > >rather rare though, most motherboards have it hard-wired
> >Thanks. I will check this. Before I open up my case, is there anywhere I
> >can/should look in log files or /sys to see if the chassis fan is
> >controllable? Would this be found in a different place than the CPU fans?
>
>No, it can't be seen from the logs nor /sys. Only hardware inspection
>can tell you, and not even in all cases.
>
Inspiron 530 manual (downloadable) says that the processor fan has a 4-pin
connector and the chassis fan has a 3-pin connector.
Apologies as this a bit OT, but hoping someone can help me understand
what's happening here. It does appear that the Inspiron has a 3-pin
connector. When I power up the box, it is very quiet for about 4 or 5
minutes. After that, the fan appears to go to 100% and never quiets down
again. Even when I cpufreq-set to powersave and cap the max CPU freq at
2.0 GHz for all four cores (80% of max), it still stays loud
indefinitely. I've opened up the box and cleaned out all dust and
visually inspected the fans, and nothing appears awry.
/sys/devices/virtual/thermal/thermal_zone0/temp consistently reports
40.0 degrees C i.e. 40000 (I'm actually suspicious of that number
because it never seems to change). Any ideas for what I can do to
troubleshoot why the fan is always running at full blast?
My Latitude E5430 has the same issue, but only when connected to
external monitors, so I suspect the GPU to produce too much heat.
--
Kind Regards
Martin Hundebøll
Frederiks Allé 99, 1.th
8000 Aarhus C
Denmark
+45 61 65 54 61
martin@xxxxxxxxxxxxx
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