Thank you! with your help I got it!! I first uninstalled lm_sensors270... which had deps to kdebase... no matter ;) And then uninstalled lm_sensors 2.8.0... deleted all sensors executables (yes there was a 2.6.5 one... what a mess) And reinstall 2.8.0. Then reinstall ksensors... and all works now! oh and yes I had to clean the sensors.conf file. Thank you for all your help!