https://bugs.freedesktop.org/show_bug.cgi?id=100666
--- Comment #3 from Lucas Riutzel lriutzel@gmail.com --- I believe this is related. Might be a separate issue though.
I have an Asus RX550. With the amdgpu drive my fan is at what I believe is 100% all the time. Though reporting doesn't work.
I can change the pwm1_enable setting between 1/2 but no difference in the fan.
$ cat /sys/class/drm/card0/device/hwmon/hwmon0/pwm1 cat: pwm1: No such device
Attempting to set pwm1 results in no change.
$ sensors amdgpu-pci-2400 Adapter: PCI adapter fan1: N/A temp1: +45.0°C (crit = +0.0°C, hyst = +0.0°C)
$ lsb_release -drc Description: Arch Linux Release: rolling Codename: n/a
$ uname -rso Linux 4.12.10-1-ARCH GNU/Linux