Comment # 8 on bug 1103356 from Thomas Blume

(In reply to Takashi Iwai from comment #7)
> (In reply to Thomas Blume from comment #6)
> > The problem doesn't happen with the Leap 42.3 kernel on top of Leap 15.
> > It returns when installing the tumbleweed kernel on Leap 15.
> 
> Thanks, so this is a still remaining regression.
> Could you report it to upstream?  e.g. bugzilla.freedesktop.org category
> DRI/Nouveau.
> 

Ah, that was the right pointer.
I've checked the bug reports there and found the debug option for the nouveau
driver. Activating it I can see this:

-->
# grep 'therm' /mnt/dmesg-4_17.txt 
[    6.595497] nouveau 0000:01:00.0: therm: FAN control: PWM
[    6.595504] nouveau 0000:01:00.0: therm: parsing the fan table failed
[    6.595515] nouveau 0000:01:00.0: therm: fan management: automatic
[    6.595520] nouveau 0000:01:00.0: therm: FAN target request: 70%
[    6.595525] nouveau 0000:01:00.0: therm: FAN target: 70
[    6.595529] nouveau 0000:01:00.0: therm: FAN update: 23
[    6.595538] nouveau 0000:01:00.0: therm: internal sensor: yes
[    6.615401] nouveau 0000:01:00.0: therm: programmed thresholds [ 90(3),
95(3), 130(2), 135(5) ]
[    7.095580] nouveau 0000:01:00.0: therm: FAN update: 26
[    7.595674] nouveau 0000:01:00.0: therm: FAN update: 29
[    8.095757] nouveau 0000:01:00.0: therm: FAN update: 32
[    8.595853] nouveau 0000:01:00.0: therm: FAN update: 35
[    9.095938] nouveau 0000:01:00.0: therm: FAN update: 38
[    9.596029] nouveau 0000:01:00.0: therm: FAN update: 41
[   10.096105] nouveau 0000:01:00.0: therm: FAN update: 44
[   10.597783] nouveau 0000:01:00.0: therm: FAN update: 47
[   11.099110] nouveau 0000:01:00.0: therm: FAN update: 50
[   11.600452] nouveau 0000:01:00.0: therm: FAN update: 53
[   12.101842] nouveau 0000:01:00.0: therm: FAN update: 56
[   12.603128] nouveau 0000:01:00.0: therm: FAN update: 59
[   13.104425] nouveau 0000:01:00.0: therm: FAN update: 62
[   13.604474] nouveau 0000:01:00.0: therm: FAN update: 65
[   14.104522] nouveau 0000:01:00.0: therm: FAN update: 68
[   14.606060] nouveau 0000:01:00.0: therm: FAN update: 70
--<

Preparing the upstream bug report.