RAM SPD's ( serial presence detect) start from address 0x50 and RAM temperature sensors start from 0x18 at same bus. The i2cdetect command will show the devices that are connected to the bus. In the following example, RAM sticks are connected to the bus SMBus 0. I2c-0 unknown SMBus PIIX4 adapter port 0 at 0b00 N/A I2c-2 unknown SMBus PIIX4 adapter port 1 at 0b20 N/A I2c-2 unknown SMBus PIIX4 adapter port 2 at 0b00 N/A Otherwise, its output will appear as follows: I2c-0 smbus SMBus PIIX4 adapter port 0 at 0b00 SMBus adapter I2c-2 smbus SMBus PIIX4 adapter port 1 at 0b20 SMBus adapter # i2cdetect -l i2c-2 smbus SMBus PIIX4 adapter port 2 at 0b00 SMBus adapter To show all the columns, use i2cdetect as root: Once installed, load the i2c-dev kernel module. To find the temperature sensors of DIMMs, install the i2c-tools package. Answering YES also automatically starts the service. Note: A systemd service is automatically enabled if users answer YES when asked about generating /etc/conf.d/lm_sensors. Ln -s '/usr/lib/systemd/system/lm_rvice' '/etc/systemd/system//lm_rvice' * Chip `Intel digital thermal sensor' (confidence: 9)īusdriver `i2c_nforce2', I2C address 0x4cĬhip `Winbond W83L771AWG/ASG' (confidence: 6)ĭo you want to overwrite /etc/conf.d/lm_sensors? (YES/no): Now follows a summary of the probes I have just done. Some south bridges, CPUs or memory controllers contain embedded sensors.ĭo you want to scan for them? This is totally safe. It is generally safeĪnd recommended to accept the default answers to all questions, To load to use lm_sensors most effectively. # sensors-detect This program will help you determine which kernel modules you need When the detection is finished, a summary of the probes is presented. This will create the /etc/conf.d/lm_sensors configuration file which is used by lm_rvice to automatically load kernel modules on boot. The "safe" answers are the defaults, so just hitting Enter to all the questions will generally not cause any problems. It will ask to probe for various hardware. See #Laptop screen issues after running sensors-detect. The full list of HWMON changes for v5.20 can be found via this pull request.Warning: Do not use anything other than the default options (by just hitting Enter), unless you know exactly what you are doing. The Dell-SMM driver meanwhile has added support for the Dell G5 5590 and Dell systems. Nearly each Linux kernel release expands sensor reading support for more desktop motherboards.Īlso new to the HWMON area in Linux 5.20 is the Aquacomputer driver now supporting the Quadro fan controller for those interested in that enthusiast/gamer-minded fan controller out of Germany. With Linux 5.20 there is a big rewrite to the LM90 driver to support several additional chipsets and improving support for existing hardware. The LM90 driver supports various LMxx, ADM1032, ADT74xx, MAX66xx, and W83Lxxxx chipsets among others. The Linux LM90 driver that is for the digital temperature sensor of the same name as well as various other chipsets has seen a substantial rewrite. The NCT775 sensor driver also adds support for the ASUS TUF GAMING B550 PLUS WiFi II motherboard. The ASUS STRIX Z690-A D4, ROG ZENITH II EXTREME, and MAXIMUS XI HERO are among the newly-supported boards with the complete list of ASUS-EC-Sensor driver coverage noted in the aforelinked article. These improvements and new board coverage is coming thanks to the open-source community, unfortunately, with no contributions from ASUS directly. This is thanks to the ongoing work in the recent ASUS-EC-Sensors Linux driver. Several newer Intel and AMD ASUS motherboards can now enjoy working motherboard/chipset/CPU/VRM temperature reporting as well as fan speeds, water cooling data, CPU current, and CPU core voltage reporting. This pull includes the previously reported work on more ASUS motherboards having working sensor support on this next kernel version. HWMON subsystem maintainer Guenter Roeck has already sent in the feature pull request of updates targeting Linux 5.20. Among those early pulls are the hardware monitoring "HWMON" subsystem updates. Ahead of the Linux 5.19 stable kernel being launched later today, a few pull requests have already begun queuing for the Linux 5.20 merge window.
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