[Bug 210787] New: amdgpu fan NA on multi gpu R9 nano

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=210787

            Bug ID: 210787
           Summary: amdgpu fan NA on multi gpu R9 nano
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.9.12-5.10.1
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri at kernel-bugs.osdl.org
          Reporter: janpieter.sollie at edpnet.be
        Regression: No

Created attachment 294229
  --> https://bugzilla.kernel.org/attachment.cgi?id=294229&action=edit
dmesg with manual GPU loading

when running sensors, the 1st GPU fan (this GPU has the display attached) is
unavailable:
> amdgpu-pci-0700
> Adapter: PCI adapter
> vddgfx:      900.00 mV
> fan1:             N/A  (min = 1000 RPM, max = 4200 RPM)
> edge:         +23.0°C  (crit = +89.0°C, hyst = -273.1°C)
> power1:       10.23 W  (cap = 150.00 W)
>
> amdgpu-pci-4300
> Adapter: PCI adapter
> vddgfx:      850.00 mV
> fan1:        1544 RPM  (min = 1000 RPM, max = 4200 RPM)
> edge:         +26.0°C  (crit = +89.0°C, hyst = -273.1°C)
> power1:       10.08 W  (cap = 150.00 W)
blacklisting amdgpu did not help, but when breaking the config (specifying an
invalid parameter in /etc/modprobe.d/amdgpu.conf), and loading it manually with
correct parameters, it works.

We're talking about a ryzen 1950x setup here with 2x r9 nano GPUs

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