Package: nagios-plugins-contrib Version: 17.20161211 The package nagios-plugins-contrib version 17.20161211 ships check_lm_sensors version 4.1.1. With this version of check_lm_sensors all my sensors are gone.
$ /usr/lib/nagios/plugins/check_lm_sensors --list sda -> 24 sdb -> 23 sdc -> 28 sdd -> 29 LM_SENSORS OK - | vs. $ sensors coretemp-isa-0000 Adapter: ISA adapter Core 0: +28.0°C (high = +90.0°C, crit = +90.0°C) Core 1: +31.0°C (high = +90.0°C, crit = +90.0°C) Core 2: +30.0°C (high = +90.0°C, crit = +90.0°C) Core 3: +30.0°C (high = +90.0°C, crit = +90.0°C) nct6776-isa-0290 Adapter: ISA adapter Vcore: +0.68 V (min = +0.00 V, max = +1.74 V) AVCC: +3.36 V (min = +2.98 V, max = +3.63 V) +3.3V: +3.36 V (min = +2.98 V, max = +3.63 V) 3VSB: +3.42 V (min = +2.98 V, max = +3.63 V) Vbat: +3.17 V (min = +2.70 V, max = +3.63 V) CHA Fan: 300 RPM (min = 0 RPM) CPU Fan: 567 RPM (min = 0 RPM) SYSTIN: +33.0°C (high = +80.0°C, hyst = +75.0°C) sensor = thermistor CPUTIN: +28.5°C (high = +80.0°C, hyst = +75.0°C) sensor = thermistor With the old version all sensors are accessable. It seems that this is a detection bug in check_lm_sensors version 4.1.1. Furthermore check_lm_sensors seems to be unmaintained. See https://github.com/matteocorti/check_lm_sensors/issues/9