Hello guys. I am using kde plasma 6.3.3 with frame 6.12.0.
My system monitor don’t show the data properly. It shows empty circles and says it missing sensor, but still show data in process chart. The Psensor works, so not the sensors’ problem. Help me plz. 
Hi! To help folks best guide you, could you please provide your basic system information from the Info Center app? The Copy Details button is the easiest way to get that ready to paste in:
Can you also provide a screenshot of the view with missing information in the System Monitor application?
Sure!
Operating System: Manjaro ARM Linux
KDE Plasma Version: 6.3.4
KDE Frameworks Version: 6.12.0
Qt Version: 6.8.3
Kernel Version: 6.12.21-1-MANJARO-RPI5 (64-bit)
Graphics Platform: Wayland
Processors: 4 × ARM Cortex-A76
Memory: 7.9 GiB of RAM
Graphics Processor 1: V3D 7.1.10.2
Graphics Processor 2: V3D 7.1.10.2
Product Name: Raspberry Pi 5 Model B Rev 1.1
And here is the screenshot of the monitor
Thank you!!
you can click on the warning and use the dialog to reassign sensors to those monitors
something has changed and the sensors that were attached are no longer available… either you changed some hardware or your system can no longer read those sensors for some reason.
just follow the dialog and edit the sensors for each item… i can’t read the language but if it’s the default 3 sensors Memory, Disk, and CPU then you should be able to relocate the sensors via the dialog box.
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Thank you!
That warning sign says “This page is missing some sensors, It won’t be able to display correctly.” Those are indeed default 3 sensors of Memory, Disk, and CPU.
I tried the dialog of reassign sensors to those monitors. The dialog are empty, has only a input frame, but no available sensor 
the next thing i would try is to install lm-sensors from your repository and run sudo sensors-detect
answer yes to all the prompts and and run the recommended command at the end of the script and/or reboot.
that should make sure any readily available sensors are active and readable.
if that still fails, there is some hope that fooling your firmware into thinking you are running windows will help, but that’s a lot more complicated.
you may also consider checking to see if your motheboard firmware is up to date.
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I am having the same issue with a Raspberry Pi 5 running Kubuntu 24.10 with KDE Plasma 6.1.5 and Framework 6.6.0. I have run sensors-detect and the output was “Sorry, no sensors were detected. Either your system has no sensors, or they are not supported, or they are connected to an I2C or SMBus adapter that is not supported.”
A check on the lm-sensors GitHub shows the latest version is 3.6.0 released in October 2019, and that is the version I have installed. It also reports as being the Arm64 version, which is certainly different than the Raspberry Pi.
Gnome’s System Monitor 47.0 reads the CPU, Memory, Network, and Disk activity, and prior to switching my desktop environment to KDE, it also read the temperature through an extension.
It would be nice to add Raspberry Pi system monitoring to KDE, or perhaps someone knows a way to add this capability through another package.
from my notes prior to running sensors-detect, but i have no idea if it applied the pi
#run this to determine the latest windows acpi version supported by the firmware
sudo strings /sys/firmware/acpi/tables/DSDT | grep -i 'windows ' | sort
#modify the grub kernel call to follow this format so linux can access the full acpi
GRUB_CMDLINE_LINUX=" acpi_osi=! \"acpi_osi=Windows 2015\" "
doing so on my brand new ASUS m/b allowed me to detect more sensors than without it.
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Thanks. When running sensors-detect, I’m getting “FATAL: Module cpuid not found in directory /lib/modules/6.11.0-1010-raspi. Failed to load module cpuid.”
It’s interesting that l can get the temperature by entering “/usr/bin/vcgencmd measure_temp” in terminal. I’ll remain on the hunt for getting the System Monitor working with a Raspberry Pi.
i’m just curious if the strings command brought up anything at on the pi… did it?
The path is not valid for the Pi. The system has /sys/firmware/ but the firmware folder has a single file titled fdt and a single folder named devicetree. Running the strings command on the fdt file provides a lengthy response, but I’m not sure what I’m looking for within that file. The piped commands after string return no response.
it’s supposed to spit out all the different windows versions that are supported by the acpi.
sounds like the pi does not have any acpi support for windows… which is not at all surprising, just a shot in the dark.