[Bug 105718] amdgpu reported fan speed looks too high (dual fan Sapphire Pulse Vega 56) - bugzilla-daemon

From: bugzilla-daemon@freedesktop.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 105718] amdgpu reported fan speed looks too high (dual fan Sapphire Pulse Vega 56)
Date: Fri, 23 Mar 2018 16:55:03 +0000	[thread overview]
Message-ID: <bug-105718-502@http.bugs.freedesktop.org/> (raw)

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https://bugs.freedesktop.org/show_bug.cgi?id=105718

            Bug ID: 105718
           Summary: amdgpu reported fan speed looks too high (dual fan
                    Sapphire Pulse Vega 56)
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: shtetldik@gmail.com

I have Sapphire Pulse Vega 56, which ships with two fans. According to this:
https://www.youtube.com/watch?v=3mKSrSluxbM&t=1m25s
in a normal scenario, fans should spin at under 650 RPM. However sensors report
for idle load around 1280 RPM for me, which looks like a double value of the
above:

amdgpu-pci-2f00
Adapter: PCI adapter
fan1: 1281 RPM
temp1: +29.0°C (crit = +0.0°C, hyst = +0.0°C)

pwm1 is set to auto:

sudo cat /sys/class/drm/card0/device/hwmon/hwmon3/pwm1_enable
2

Is this a misdetection, or it's supposed to be like that? Actual fans are
pretty silent.

System: Debian testing, x86_64 (kernel 4.15.4).

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