Comment # 34 on bug 1103356 from Thomas Blume

(In reply to Takashi Iwai from comment #32)
> Thanks.  The behavior at this time looks normal, isn't it?
> 
> The measured temperature at start was 77.14C (= 7154 * 458/10000 -
> 25051/100), and it went down to 55.89C (= 6690), slightly up to 68C (6968).
> 
> Does the boost behavior appear when you turn off the console loglevel?
> 
> And my wild guess now is that it's because polling is disabled when entering
> this mode.  Will cook up another test patch.

The fan boost is indeed gone, with or without nouveau debug logging.
Still, the fan stays noisy
/sys/devices/pci0000\:00/0000\:00\:01.0/0000\:01\:00.0/hwmon/hwmon0/pwm1 shows
78 with and at 80 without debug logging, even though there is very low gpu
load.
I'd expect that the fan speed decreases as the gpu cools down.
Will now try your latest patch and report.