Did you run 'sensors-detect'? If not go to a root term and run it. When it asks you a question just type in which ever one is in caps. There will also be a couple of things in there that it will tell you to copy to other files. That will make it load during the boot. I usually copy and paste to a kwrite document and do that when I get done with the detect thing.
Since each mobo is a bit different you need to really watch where it tells you to copy the lines. They are short and right at the end of sensors-detect. Mine has two for one file and one for another, can't remember what they were now.
Post back what you get.