Hello Rudolf, first thank you for your response. According to your last Mail, I would like to help you, but I've got no specific knowlegde about ACPI and sensor reading. I read the ACPI specification cause I searched for a chance to write own devices (e.g. Fan) in my DSDT to get fan value reading. The fan is connected via 3-Pin cable and I think there is a readable value, even if sensors-detect find no sensor. After read this document I'm not one step forward with this idea. The only real help I could give you would be testing and reporting. Or is there any kind of possible help I forgot? Now, my new problem. I have no idea how to apply the patch you send me. Maybe this little problem "demonstrates" my specific linux knowlegde. Ralf P.S.: Sorry for my horrible english. I'm from germany. :-D Hope you could understand all I said.