Comment # 4 on bug 1103356 from Thomas Blume

(In reply to Takashi Iwai from comment #3)
> Did you try the very latest kernel in OBS Kernel:openSUSE-15.0?
> Basically the nouveau drm driver on Leap 15.0 took all 4.14.y backports.
> It might be something missing in hwmon side, though.

Thanks for the hint Takashi.
I've tried with:

kernel-default-4.12.14-lp150.93.1.g8ee019b.x86_64 from
https://download.opensuse.org/repositories/Kernel:/openSUSE-15.0/standard/

but the fan still runs at high speed, creating noise.

/sys/class/drm/card0/device/hwmon/hwmon0/pwm1

shows it running at 70%.
gpu temperature at 72�C.
Rebooting to 42.3 and it goes back to 20%.