Comment 154 for bug 370173

@Michal Pěnka -- yes you can just download the appropriate kernel for you i386/amd64 and just install those with dpkg. They should install in parallel and you can simply select them in the main grub menu.

@all -- the key desire here is to isolate exactly when this issue appeared. There seems to be enough people indicating they have an issue to make it likely that later kernels are triggering this behaviour. As generally the kernel does not get involved in fan control directly it must be something else triggering the change. As there are some 20k changes in every mainline release and normally at least 2 mainline releases in every Ubuntu release, there is a huge amount of change in each kernel. This huge change makes it hard to pinpoint such a behaviour. The normal way to do this is to identify kernel versions which exhibit the behaviour and those which do not and bisect the gap to narrow down the the exact mainline release produced the change, and then within that release. This is the source of my requests for testing of specific kernel versions.