[Bug 201539] AMDGPU R9 390 automatic fan speed control in Linux 4.19/4.20/5.0

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=201539

--- Comment #42 from muncrief (rmuncrief@humanavance.com) ---
(In reply to MasterCATZ from comment #41)
> aio@aio:/usr/local/bin$ sudo systemctl status amdgpu-fancontrol
> ● amdgpu-fancontrol.service - amdgpu-fancontrol
>    Loaded: loaded (/etc/systemd/system/amdgpu-fancontrol.service; enabled;
> vendor preset: enabled)
>    Active: active (running) since Fri 2019-12-06 14:45:07 AEST; 3s ago
>  Main PID: 23922 (amdgpu-fancontr)
>     Tasks: 2 (limit: 4915)
>    Memory: 3.3M
>    CGroup: /system.slice/amdgpu-fancontrol.service
>            ├─23922 /bin/bash /usr/local/bin/amdgpu-fancontrol
>            └─23979 sleep 1
> 
> Dec 06 14:45:08 aio amdgpu-fancontrol[23922]: changing pwm to 175
> Dec 06 14:45:08 aio amdgpu-fancontrol[23922]:
> /usr/local/bin/amdgpu-fancontrol: line 65: echo: write error: Invalid
> argument
> Dec 06 14:45:09 aio amdgpu-fancontrol[23922]: current temp: 62000
> Dec 06 14:45:09 aio amdgpu-fancontrol[23922]: interpolated pwm value for
> temperature 62000 is: 175
> Dec 06 14:45:09 aio amdgpu-fancontrol[23922]: current pwm: 104, requested to
> set pwm to 175
> Dec 06 14:45:09 aio amdgpu-fancontrol[23922]: Fanmode not set to manual.
> Dec 06 14:45:09 aio amdgpu-fancontrol[23922]: setting fan mode to 1
> Dec 06 14:45:09 aio amdgpu-fancontrol[23922]: temp at last change was 62000
> Dec 06 14:45:09 aio amdgpu-fancontrol[23922]: changing pwm to 175
> Dec 06 14:45:09 aio amdgpu-fancontrol[23922]:
> /usr/local/bin/amdgpu-fancontrol: line 65: echo: write error: Invalid
> argument

I was about to call it a day when I got your email notifications. The line it's
talking about is:

echo "$NEW_PWM" > "$FILE_PWM"

So it looks like the "$FILE_PWM" variable is not valid. Remember, you have to
change the variables under the comment "hwmon paths, hardcoded for one amdgpu
card, adjust as needed" to whatever your system requires. To debug the
variables I would execute the 4 lines that set HWMON, FILE_PWM, FILE_FANMODE,
and FILE_TEMP from terminal and see where things are going wrong. I have to go
now but I'll try to help you more tomorrow if you're still having problems. But
once you have those variables set correctly the script should work. Here's what
the service status output looks like on my system:

   Loaded: loaded (/etc/systemd/system/amdgpu-fancontrol.service; enabled;
vendor preset: disabled)
   Active: active (running) since Thu 2019-12-05 18:16:27 PST; 2h 28min ago
 Main PID: 836 (amdgpu-fancontr)
    Tasks: 2 (limit: 4915)
   Memory: 7.7M
   CGroup: /system.slice/amdgpu-fancontrol.service
           ├─  836 /bin/bash /usr/local/bin/amdgpu-fancontrol
           └─14235 sleep 1

Dec 05 20:44:46 Entropod amdgpu-fancontrol[836]: changing pwm to 80
Dec 05 20:44:47 Entropod amdgpu-fancontrol[836]: current temp: 49000
Dec 05 20:44:47 Entropod amdgpu-fancontrol[836]: interpolated pwm value for
temperature 49000 is: 90
Dec 05 20:44:47 Entropod amdgpu-fancontrol[836]: current pwm: 76, requested to
set pwm to 90
Dec 05 20:44:47 Entropod amdgpu-fancontrol[836]: temp at last change was 48000
Dec 05 20:44:47 Entropod amdgpu-fancontrol[836]: changing pwm to 90
Dec 05 20:44:48 Entropod amdgpu-fancontrol[836]: current temp: 48000
Dec 05 20:44:48 Entropod amdgpu-fancontrol[836]: interpolated pwm value for
temperature 48000 is: 80
Dec 05 20:44:48 Entropod amdgpu-fancontrol[836]: current pwm: 86, requested to
set pwm to 80
Dec 05 20:44:48 Entropod amdgpu-fancontrol[836]: not changing pwm, we just did
at 49000, next change when below 43000

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