CPU fan control is not available with R540 on 10.10

[cosmicheart]

I have a R540 on 10.10.

samsung-tools --cpu silent

reports that

CPU Temperature: 55.0 °C
CPU fan control is not available

What do I have to do to enable CPU fan control?

thanks!

[cosmicheart]

Ah, turns out I needed to install kernel headers for the easy-slow-down-manager to be installed properly.