hello, It might happen that the sensor is on another bus, or uses some other chips. But I think compaq has its own proprietary infrastructure called cpqhealth but I think it is not for 2.6 kernels. Please ask them for support, or how to access their chips. You can also try: modprobe i2c-piix4 modprobe i2c-dev i2cdetect 0 And send the output to us. It will detect again in "raw" form. But I think there will be nothing. Regards Rudolf