[Bug 119211] amdgpu disables fan by default

https://bugzilla.kernel.org/show_bug.cgi?id=119211

--- Comment #9 from Stas Sergeev stsp@list.ru --- (In reply to Alex Deucher from comment #8)

By default the hw controls the fan based on temperature, etc.

For me not.

Not all cards have a fan control. If you do, then the following standard HWMON pwm attributes should be available:

• pwm1_enable: Current fan management mode (MANUAL or AUTO)

I have always '1' there. Trying to write 0 or 2 there still leaves 1. It simply doesn't change.

• pwm1: Current PWM value (power percentage)

Always 0, unless manually written.

The fan can be driven in different modes:

• 1: The fan can be driven in manual (use pwm1 to change the speed);
• 2; The fan is driven automatically depending on the temperature.

What should I write to pwm1_enable? '2'? It doesn't change.