I'm struggling to get thinkfan set up and working on my lenovo x250. I have it installed, but I'm not convinced it is controlling the fan speed. If I run:
$ cat /proc/acpi/ibm/fan

in the Terminal, I get:
status: enabled

But I'm under the impression it should be "disabled" when thinkfan is controlling things.

If I run:

$ sudo thinkfan -n

I get:
WARNING: Using default fan control in /proc/acpi/ibm/fan

How do I hand off control of the fan to thinkfan (where I can adjust the setpoints)?