PWM fan speed too high

[poma]

On 24.07.2014 15:52, poma wrote:
> On 24.07.2014 14:31, Klaus-Peter Schrage wrote:
>> Am 24.07.2014 13:31, schrieb Klaus-Peter Schrage:
>>> Am 24.07.2014 12:48, schrieb poma:
>>>> Your is CPU fan?
>>> Yes
>> I have to correct myself: It is definitely the graphics adapter fan
>> which is going berserk since kernel-3.15.6-200.fc20.x86_64
>>
>
> https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/tree/drivers/gpu/drm/nouveau/core/subdev/therm/fan.c?h=linux-3.14.y#n195
> static void
> nouveau_therm_fan_set_defaults(struct nouveau_therm *therm)
> {
> 	struct nouveau_therm_priv *priv = (void *)therm;
>
> 	priv->fan->bios.pwm_freq = 0;
> 	priv->fan->bios.min_duty = 0;
> 	priv->fan->bios.max_duty = 100;
> 	priv->fan->bios.bump_period = 500;
> 	priv->fan->bios.slow_down_period = 2000;
> /*XXX: talk to mupuf */
> #if 0
> 	priv->fan->bios.linear_min_temp = 40;
> 	priv->fan->bios.linear_max_temp = 85;
> #endif
> }
>
> https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/tree/drivers/gpu/drm/nouveau/core/subdev/therm/fan.c?h=linux-3.15.y#n195
> static void
> nouveau_therm_fan_set_defaults(struct nouveau_therm *therm)
> {
> 	struct nouveau_therm_priv *priv = (void *)therm;
>
> 	priv->fan->bios.pwm_freq = 0;
> 	priv->fan->bios.min_duty = 0;
> 	priv->fan->bios.max_duty = 100;
> 	priv->fan->bios.bump_period = 500;
> 	priv->fan->bios.slow_down_period = 2000;
> 	priv->fan->bios.linear_min_temp = 40;
> 	priv->fan->bios.linear_max_temp = 85;
> }
>
> "drm/nouveau/therm: let the vbios decide on the automatic fan management mode"
> https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/drivers/gpu/drm/nouveau/core/subdev/therm/fan.c?h=linux-3.15.y&id=0e994d6
>     This should fix automatic fan management on fermi cards who do not have 0x46 entries in the thermal table.
>     On my nve6, the blob sets the default linear range from 40°C to 100°C but my nvcf's default values are 40°C to 85°C.
>     Let's keep 85 as a default for everyone.
>
> Here refers to NVCF, your is NV108 (GK208) i.e. GeForce GT 630
> http://nouveau.freedesktop.org/wiki/CodeNames/
>
> The fan is really LOUD all the time. How do I make it more quiet?
> http://nouveau.freedesktop.org/wiki/FAQ/#index25h3
> ... In the mean time, if you are interested, you can read PowerManagement and/or contact mupuf on the #nouveau freenode IRC channel.
>

Fan at full speed on Dell T1650
https://bugzilla.redhat.com/show_bug.cgi?id=1121331

[NVCF] PWM fan speed too high
https://bugs.freedesktop.org/show_bug.cgi?id=80901

[Nouveau] hwmon: question about the sysfs interface
http://lists.freedesktop.org/archives/nouveau/2014-July/018012.html


nouveau funky fan club