HC4 - Noctua NF-A9 can't be controlled

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sitalk
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HC4 - Noctua NF-A9 can't be controlled

Post by sitalk »

So i recently switched to a Noctua NF-A9 for my HC4 and immediately noticed it always blows at full speed.
My guess is that the old fan was like that too but I never noticed because wasn't very noisy.

I wonder if I am affected by the same issue as in this thread from last year: viewtopic.php?f=207&t=47338
But I do have some different outputs when running the usual commands.

uname -a

Code: Select all

Linux orochi 5.14.0-odroid-arm64 #1 SMP PREEMPT Debian 5.14.18-202201281245~buster (2022-01-28) aarch64 GNU/Linux

This is how I connected the PWM connector to the board:

IMG_20240503_205232.jpg
IMG_20240503_205232.jpg (48.14 KiB) Viewed 192 times

The fan always blows at full speed from the moment the board have power.

I can't execute properly the manual/automatic mode setting:

Code: Select all

echo 2 | sudo tee /sys/class/hwmon/hwmon0/pwm1_enable
tee: /sys/class/hwmon/hwmon0/pwm1_enable: Permission denied
2
When running pwmconfig I get this:

Code: Select all

Found the following devices:
   hwmon0 is cpu_thermal
   hwmon1 is ddr_thermal
   hwmon2 is pwmfan

Found the following PWM controls:
   hwmon2/pwm1           current value: 255

Giving the fans some time to reach full speed...
Found the following fan sensors:
   hwmon2/fan1_input     current speed: 2140 RPM

Warning!!! This program will stop your fans, one at a time,
for approximately 5 seconds each!!!
This may cause your processor temperature to rise!!!
If you do not want to do this hit control-C now!!!
Hit return to continue:

Testing pwm control hwmon2/pwm1 ...
  hwmon2/fan1_input ... speed was 2140 now 2111
    no correlation

No correlations were detected.
There is either no fan connected to the output of hwmon2/pwm1,
or the connected fan has no rpm-signal connected to one of
the tested fan sensors.
During pwmconfig's test the fan doesn't stop or react in any way.

And if I check sensors I can see the fan is running always at around the maximum RPM.

Code: Select all

pwmfan-isa-0000
Adapter: ISA adapter
Default Fan: 2109 RPM

cpu_thermal-virtual-0
Adapter: Virtual device
CPU Temp:     +28.7°C  (crit = +110.0°C)

ddr_thermal-virtual-0
Adapter: Virtual device
DDR Temp:     +29.8°C  (crit = +110.0°C)
What can be causing this?

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sitalk
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Re: HC4 - Noctua NF-A9 can't be controlled

Post by sitalk »

I figured automatic/manual mode wasn't executing because in my setup pwm1 is on hwmn2.
But now, even if I disable the fancontrol service and run for example:

Code: Select all

echo 1 | sudo tee /sys/class/hwmon/hwmon2/pwm1_enable
echo 50 | sudo tee /sys/class/hwmon/hwmon2/pwm1
The fan will remain at full speed:

Code: Select all

pwmfan-isa-0000
Adapter: ISA adapter
Default Fan: 2111 RPM
Even pwmconfig will read correctly the new speed setting:

Code: Select all

Found the following devices:
   hwmon0 is cpu_thermal
   hwmon1 is ddr_thermal
   hwmon2 is pwmfan

Found the following PWM controls:
   hwmon2/pwm1           current value: 50

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Re: HC4 - Noctua NF-A9 can't be controlled

Post by tomerr »

i have the same problem with a smaller PWM controlled Noctua fan (detailed in the thread you linked). BUT, it did used to work properly and something happened (which i have no idea what) and it became uncontrollable .
at the moment i disabled it completely with "disable_cooler" module (page 2 same thread)

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Re: HC4 - Noctua NF-A9 can't be controlled

Post by sitalk »

I really wouldn't want to come to this but with an external fan controller one could at least set a fixed slower speed.

Noctua has one ridiculously overpriced called NA-FC1:

42e83929078d3b30681e97e13d4061f2.jpg
42e83929078d3b30681e97e13d4061f2.jpg (12.51 KiB) Viewed 169 times

It is not ideal and makes it entirely useless to have a PWM connection.
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tomerr (Sat May 04, 2024 7:59 pm)

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Re: HC4 - Noctua NF-A9 can't be controlled

Post by tomerr »

^^ i actually consider getting this controller and a new Noctua 5V fan, and connect it directly to USB adapter. just realized there's a store on Aliexpress who sells Noctua products, and with coupons and super low shipping prices - it's actually cheaper from buying it on Amazon (for me only the shipping from Amazon US is 12$ by itself). one thing that bothers me though , those leds on the controller look very bright, which is kind of annoying

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Re: HC4 - Noctua NF-A9 can't be controlled

Post by sitalk »

The plastic case can be easily opened.

90_3707d8f2be163bd14c78cf07586f13bb_s.jpg
90_3707d8f2be163bd14c78cf07586f13bb_s.jpg (13.46 KiB) Viewed 155 times

You can de-solder those leds eventually.
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tomerr (Sat May 04, 2024 8:52 pm)

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Re: HC4 - Noctua NF-A9 can't be controlled

Post by tomerr »

Image
¯\_(ツ)_/¯
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