Anyone know when the fan turns on?

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ODroidope
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Anyone know when the fan turns on?

Post by ODroidope »

I have been waiting for my fan to turn on
I have upgraded to a 2a power adapter
however feel device is hot enough
to turn the fan on by now? or is it
always on?

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mctom
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Re: Anyone know when the fan turns on?

Post by mctom »

Hi,
Depending on your ambient temperature, fan may never turn on. In my apartament it never does during normal use.
By default fan turns on at 50 degrees, or something like that.

you can check current CPU temperature and fan operation threshold with commands:

Code: Select all

mctom@Tomusiomat-ARM:~$ cat /sys/devices/virtual/thermal/thermal_zone0/temp
33500
mctom@Tomusiomat-ARM:~$ cat /sys/devices/virtual/thermal/thermal_zone0/trip_point_3_temp 
50000
Temperatures are given in degrees Celcius, but numbers must be divided by 1000 of course.

In order to artificially heat up CPU and see if fan works, you may want to apply some stress:

Code: Select all

mctom@Tomusiomat-ARM:~$ stress -c 6
This program loads all 6 CPU cores with nonsense operations.
In my case fan turned on after 3 seconds or so. To stop stress press ctrl+C
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odroid (Tue Oct 05, 2021 10:46 am)
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Re: Anyone know when the fan turns on?

Post by ODroidope »

Im thinking its over 50 degrees already hot to the touch etc.
Not sure I want to run the stress tests if the board has an issue
or the fan unless there is some kind of failsafe etc.

On another note as to not start another thread are there quick keys
to shutdown windows, kill window or firefox specifically which freezes
the whole system sometimes. Love the speed of the N2+ very happy
to have such a fast system vs my past linux puppy on fossilized tech

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Re: Anyone know when the fan turns on?

Post by mctom »

You can carry on with the proposed test, as 50 deg C is far from critical. Recently in another thread it turned out the fan sometimes has threshold of 65 degrees, not sure why. The command above can let you read the current setting, or you can run stress and see if it spins up.

Most modern devices, including Odroids, throttle (slow down) CPU if it's critically hot to protect it from failure.
The fan is there only because you don't want your system to slow down, by assuring low temperature in the first place.
Many Intel Atom machines (tablets, notebooks, or even my desktop) don't have any fans whatsoever and depend solely on throttling to keep themselves healthy.

For linux usage questions you should create a new thread, I think, and probably tell something more about the distro you're using. Every desktop environment is different.
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Re: Anyone know when the fan turns on?

Post by ODroidope »

Thanks McTom again for your advice will do what you suggest
and try harder to keep distancing myself from Criminal Intel
Always prefer to support the little guys than the corrupt.
Hopefully can sway more away from the mainstream pirates.
Just got to find a way to get the fan running at a lower temp
so it improves the overall longevity of this silicon beauty.

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