Re: software fan control
Hi,
Have a look at a package called lm-sensors, it has a program bundled
in it for controlling fans.
HTHs
2009/8/15 andy baxter <andy@earthsong.free-online.co.uk>:
> Hi,
>
> I have just built a mini-itx box with a jetway J7F4 motherboard. It's great,
> apart from the fan is a bit noisier than I had hoped - I bought it hoping
> that it would be quiet enough to leave switched on all the time in my living
> room, but it isn't. I've thought of just disconnecting the fan, as it seems
> to run fairly cool even with the CPU at full load - around 35 deg C, but I
> would rather not do this unless there's no alternative.
>
> Is there a way of telling the kernel to leave the fan switched off unless
> the CPU temp goes above a certain value, say 50 deg C? I had a look through
> /sys and found this directory:
>
> /sys/class/thermal/thermal_zone0
> total 0
> lrwxrwxrwx 1 root root 0 2009-08-14 21:17 cdev0 -> ../cooling_device1
> -r--r--r-- 1 root root 4096 2009-08-14 21:17 cdev0_trip_point
> lrwxrwxrwx 1 root root 0 2009-08-14 21:17 cdev1 -> ../cooling_device0
> -r--r--r-- 1 root root 4096 2009-08-14 21:17 cdev1_trip_point
> lrwxrwxrwx 1 root root 0 2009-08-14 20:56 device ->
> ../../../devices/LNXSYSTM:00/LNXTHERM:00/LNXTHERM:01
> -rw-r--r-- 1 root root 4096 2009-08-14 21:17 mode
> drwxr-xr-x 2 root root 0 2009-08-14 21:16 power
> lrwxrwxrwx 1 root root 0 2009-08-14 20:56 subsystem -> ../../thermal
> -r--r--r-- 1 root root 4096 2009-08-14 21:17 temp
> -r--r--r-- 1 root root 4096 2009-08-14 21:17 trip_point_0_temp
> -r--r--r-- 1 root root 4096 2009-08-14 21:17 trip_point_0_type
> -r--r--r-- 1 root root 4096 2009-08-14 21:17 trip_point_1_temp
> -r--r--r-- 1 root root 4096 2009-08-14 21:17 trip_point_1_type
> -r--r--r-- 1 root root 4096 2009-08-14 21:17 trip_point_2_temp
> -r--r--r-- 1 root root 4096 2009-08-14 21:17 trip_point_2_type
> -r--r--r-- 1 root root 4096 2009-08-14 21:16 type
> -rw-r--r-- 1 root root 4096 2009-08-14 20:55 uevent
>
> There are also directories cooling_device0 and cooling_device1, both of
> which contain the files 'type' (FAN), and 'cur_state' (1 for device 0, 0 for
> device 1). I only have 1 fan connected, so I assume cooling_device0 is the
> fan.
>
> Any suggestions as to where I should go from here?
>
> thanks,
>
> andy
>
>
> --
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