CPU fan running at full speed

Thu Jul 24 10:29:20 UTC 2014

As of updating to kernel-3.15.5-200.fc20.x86_64, the cpu fan (and 
probably the case fan too) continuously runs at full speed, right from 
the system start.
This behaviour is still present with the the most recent kernel 
3.15.6-200..., but it wasn't with the former version 3.14.8-200... (I 
re-checked this by downloading this package from Koji and manually 
installing it).

It's a desktop system with an Asus B85M-G board and an Intel i3-4330 CPU.

The symptoms might be similar to a recent bugzilla report, which hasn't 
been commented yet:
https://bugzilla.redhat.com/show_bug.cgi?id=1121331

Has anyone experienced something similar?