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codlord
Asked: 2021-03-13 02:07:27 +0800 CST

Temperature sensors hwmon5 and hwmon6 keep swapping around. How can I consistently monitor devices?

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I have a PC (Asus Transformer 3 Pro T303UA) where I am trying to monitor the temperature of various devices (using conky). But on some boot-ups hwmon5 is the WiFi device and hwmon6 is the CPU but on other boot-ups it's reversed (hwmon5 is the CPU and hwmon6 is the WiFi).

So if I setup monitoring to look at CPU cores hwmon5 temp 2 and hwmon5 temp 3 when hwmon5 is the CPU that works and is correct, but if hwmon5 changes to be the wifi device then there is no temp 2 or temp 3 so the monitoring fails.

Does anyone know why this one PC seems to change it's devices around (none of my other PCs seem to do this) and if I can stop it from happening or get all the temperatures some other way which will always be consistent?

Today hwmon6 is the cpu:

ls -la /sys/class/hwmon/

hwmon0 -> ../../devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/ACPI0003:00/power_supply/AC0/hwmon0
hwmon1 -> ../../devices/virtual/thermal/thermal_zone0/hwmon1
hwmon2 -> ../../devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/PNP0C0A:00/power_supply/BAT0/hwmon2
hwmon3 -> ../../devices/virtual/thermal/thermal_zone6/hwmon3
hwmon4 -> ../../devices/platform/asus-nb-wmi/hwmon/hwmon4
hwmon5 -> ../../devices/virtual/thermal/thermal_zone8/hwmon5
hwmon6 -> ../../devices/platform/coretemp.0/hwmon/hwmon6
20.10

1 Answers

  1. Best Answer

    From version 1.11.3 (feb 2019) of conky, you can now use the device name instead of a number. This searches in all the /sys/class/hwmon/*/name files for the name, and takes the first one that matches. So instead of ${hwmon 5 temp 2} you might be able to use, say,

    ${hwmon coretemp temp 2}

    if coretemp is the string in hwmon5/name. Failing that, the simplest answer is to use a small script to edit your config file before starting conky as I don't think it will be easy to fix the order of discovery of these i2c devices. See also, the lm_sensors package that can find sensor values for you.

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