CPU fan running at full speed

[poma]

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 fan club