Install lm_sensors / lm-sensors package This package may or may not be installed. Type the following command to install: {{{ # yum install lm_sensors }}} Configure lm_sensors To detect hardware monitoring chips, type the following command as the root user: {{{ # sensors-detect }}} Sample output: {{{ # sensors-detect # sensors-detect revision 5132 (2008-02-26 14:52:35 +0100) This program will help you determine which kernel modules you need to load to use lm_sensors most effectively. It is generally safe and recommended to accept the default answers to all questions, unless you know what you're doing. We can start with probing for (PCI) I2C or SMBus adapters. Do you want to probe now? (YES/no): Probing for PCI bus adapters... Use driver `i2c-sis96x' for device 0000:00:02.1: Silicon Integrated Systems SMBus Controller We will now try to load each adapter module in turn. Module `i2c-sis96x' already loaded. If you have undetectable or unsupported I2C/SMBus adapters, you can have them scanned by manually loading the modules before running this script. To continue, we need module `i2c-dev' to be loaded. Do you want to load `i2c-dev' now? (YES/no): Module loaded successfully. We are now going to do the I2C/SMBus adapter probings. Some chips may be double detected; we choose the one with the highest confidence value in that case. If you found that the adapter hung after probing a certain address, you can specify that address to remain unprobed. Next adapter: SiS96x SMBus adapter at 0x10c0 (i2c-0) Do you want to scan it? (YES/no/selectively): Client found at address 0x2f Probing for `National Semiconductor LM78'... No Probing for `National Semiconductor LM78-J'... No Probing for `National Semiconductor LM79'... No Probing for `National Semiconductor LM80'... No Probing for `Analog Devices ADT7470'... No Probing for `Winbond W83781D'... No Probing for `Winbond W83782D'... No Probing for `Winbond W83792D'... No Probing for `Winbond W83793R/G'... No Probing for `Winbond W83791SD'... No Probing for `Winbond W83627HF'... No Probing for `Winbond W83627EHF'... No Probing for `Winbond W83627DHG'... No Probing for `Asus AS99127F (rev.1)'... No Probing for `Asus AS99127F (rev.2)'... No Probing for `Asus ASB100 Bach'... No Probing for `Winbond W83L786NR/NG/R/G'... No Probing for `Analog Devices ADM9240'... No Probing for `Dallas Semiconductor DS1780'... No Probing for `National Semiconductor LM81'... No Probing for `Analog Devices ADM1029'... No Probing for `ITE IT8712F'... No Probing for `Fintek custom power control IC'... No Probing for `Winbond W83791D'... No Client found at address 0x50 Probing for `Analog Devices ADM1033'... No Probing for `Analog Devices ADM1034'... No Probing for `SPD EEPROM'... Yes (confidence 8, not a hardware monitoring chip) Probing for `EDID EEPROM'... No Client found at address 0x51 Probing for `Analog Devices ADM1033'... No Probing for `Analog Devices ADM1034'... No Probing for `SPD EEPROM'... Yes (confidence 8, not a hardware monitoring chip) Probing for `EDID EEPROM'... No Some chips are also accessible through the ISA I/O ports. We have to write to arbitrary I/O ports to probe them. This is usually safe though. Yes, you do have ISA I/O ports even if you do not have any ISA slots! Do you want to scan the ISA I/O ports? (YES/no): Probing for `National Semiconductor LM78' at 0x290... No Probing for `National Semiconductor LM78-J' at 0x290... No Probing for `National Semiconductor LM79' at 0x290... No Probing for `Winbond W83781D' at 0x290... No Probing for `Winbond W83782D' at 0x290... No Probing for `IPMI BMC KCS' at 0xca0... No Probing for `IPMI BMC SMIC' at 0xca8... No Some Super I/O chips may also contain sensors. We have to write to standard I/O ports to probe them. This is usually safe. Do you want to scan for Super I/O sensors? (YES/no): Probing for Super-I/O at 0x2e/0x2f Trying family `National Semiconductor'... No Trying family `SMSC'... No Trying family `VIA/Winbond/Fintek'... Yes Found `Winbond W83697HF/F/HG Super IO Sensors' Success! (address 0x290, driver `w83627hf') Probing for Super-I/O at 0x4e/0x4f Trying family `National Semiconductor'... No Trying family `SMSC'... No Trying family `VIA/Winbond/Fintek'... No Trying family `ITE'... No Some south bridges, CPUs or memory controllers may also contain embedded sensors. Do you want to scan for them? (YES/no): Silicon Integrated Systems SIS5595... No VIA VT82C686 Integrated Sensors... No VIA VT8231 Integrated Sensors... No AMD K8 thermal sensors... No AMD K10 thermal sensors... No Intel Core family thermal sensor... No Intel AMB FB-DIMM thermal sensor... No Now follows a summary of the probes I have just done. Just press ENTER to continue: Driver `w83627hf' (should be inserted): Detects correctly: * ISA bus, address 0x290 Chip `Winbond W83697HF/F/HG Super IO Sensors' (confidence: 9) Do you want to overwrite /etc/sysconfig/lm_sensors? (YES/no): Starting lm_sensors: loading module w83627hf [ OK ] }}} How to read the sensors: Type the following command on the command line: {{{ $ sensors}}} Sample output: {{{ $ sensors w83697hf-isa-0290 Adapter: ISA adapter VCore: +1.54 V (min = +1.22 V, max = +3.33 V) +3.3V: +3.31 V (min = +2.08 V, max = +0.19 V) ALARM +5V: +5.11 V (min = +5.13 V, max = +1.72 V) ALARM +12V: +11.80 V (min = +0.67 V, max = +8.33 V) ALARM -12V: -11.70 V (min = -12.20 V, max = +1.70 V) -5V: -4.90 V (min = -6.10 V, max = -0.02 V) V5SB: +5.40 V (min = +5.38 V, max = +0.70 V) ALARM VBat: +3.06 V (min = +0.38 V, max = +0.06 V) ALARM fan1: 2700 RPM (min = 84375 RPM, div = 4) ALARM fan2: 1962 RPM (min = 4560 RPM, div = 4) ALARM temp1: +41°C (high = +32°C, hyst = +37°C) sensor = thermistor ALARM temp2: +36.5°C (high = +90°C, hyst = +90°C) sensor = diode alarms: Chassis intrusion detection ALARM beep_enable: Sound alarm enabled}}}