pjones
[BUG] Desktop widget "systemMonitor" does not load
Description
When creating a system monitor widget, the widget load just a back box. Vene after restarting the system it stays as black box.
However, killing and restarting plasmashell with the command kquitapp6 plasmashell; kstart plasmashell fix the issue and makes the widgets works.
Here is the plasma files before and after restaring plasmashell, the files are slightly different so I don't know if the difference between the files can help to identify the issue.
plasma-org.kde.plasma.desktop-appletsrc.After.txt plasma-org.kde.plasma.desktop-appletsrc.Before.txt plasmashellrc.After.txt plasmashellrc.Before.txt
Here is my module with my plasma config:
Steps to reproduce
Steps
On a NixOs install with Home-manager and flakes, add plasma-manager following the instructions on github and add a desktop widget with systemMonitor.
Example:
programs.plasma = {
enable = true;
overrideConfig = true;
desktop.widgets = [
{
# Memory Chart
systemMonitor = {
title = "Memory Usage";
position = {
horizontal = calcDesktopLength 54;
vertical = calcDesktopLength 2;
};
size = {
width = calcDesktopLength 50;
height = calcDesktopLength 26;
};
displayStyle = "org.kde.ksysguard.linechart";
sensors = [
{
name = "memory/physical/used";
color = colors.primary;
label = "Used Physical Memory";
}
];
};
}
]
};
Rebuild the nixos configuration and restart the computer for the configuration to be applied.
Expected result
I expected the widget to be loaded and functional.
Actual Results
The widget are here on the desktop but not functional
Environment
home-assistant + flakes
--------------------
OS: NixOS 25.11.20250518.292fa7d (
Host: LENOVO LNVNB161216
Kernel: 6.12.28
Uptime: 24 mins
Packages: 1252 (nix-system), 937 (
Shell: bash 5.2.37
Resolution: 1920x1080, 2560x1440
DE: Plasma 6.3.5 (Wayland)
WM: kwin
Icons: Papirus-Dark [GTK2/3]
Terminal: .konsole-wrappe
CPU: AMD Ryzen 7 5800H with Radeon
GPU: NVIDIA GeForce RTX 3050 Ti Mo
GPU: AMD ATI Radeon Vega Series /
Memory: 6465MiB / 13827MiB
I’m encountering a similar issue.
With overrideConfig set to true, running systemctl --user restart plasma-plasmashell.service consistently fixes the problem even after relog. (Edit: it works after relog, but not reboot)
This is unexpected since overrideConfig should reset the configuration files, so the fix shouldn’t persist. So I think there's something else besides the changes in the config file done by plasma.
systemctl --user restart plasma-plasmashell.service does work but does not persist after reboot unfortunately.
edit: However with overrideConfig set to false the fix does persist after reboot
Ive got a very similar problem, except for me systemctl --user restart plasma-plasmashell.service only works partially (for one out of 5 widgets). Heres my config:
desktop.widgets = [
# --- Applet 1014: IO ---
{
name = "org.kde.plasma.systemmonitor.diskactivity";
position = { horizontal = 1696; vertical = 656; };
size = { width = 352; height = 224; };
config = {
Appearance = {
chartFace = "org.kde.ksysguard.linechart";
title = "SSD";
};
SensorColors."disk/nvme0n1/read" = "186,61,233";
SensorColors."disk/nvme0n1/write" = "179,233,61";
SensorColors."lmsensors/nvme-pci-0100/temp1" = "134,233,61";
SensorLabels."disk/nvme0n1/read" = "Read Rate";
SensorLabels."disk/nvme0n1/write" = "Write Rate";
SensorLabels."lmsensors/nvme-pci-0100/temp1" = "Temperature";
# Convert the JSON-like string to a proper Nix list
Sensors.highPrioritySensorIds = [ "disk/nvme0n1/read" "disk/nvme0n1/write" ];
Sensors.lowPrioritySensorIds = [ "lmsensors/nvme-pci-0100/temp1" ];
};
}
# --- Applet 1016: Memory ---
{
name = "org.kde.plasma.systemmonitor.memory";
position = { horizontal = 1696; vertical = 224; };
size = { width = 352; height = 224; };
config = {
Appearance = {
chartFace = "org.kde.ksysguard.piechart";
title = "Memory";
};
SensorColors = {
"memory/physical/applicationPercent" = "61,163,233";
"memory/physical/bufferPercent" = "233,181,61";
"memory/physical/cachePercent" = "233,82,61";
"memory/swap/usedPercent" = "71,61,233";
};
SensorLabels."memory/swap/usedPercent" = "Swap";
Sensors.highPrioritySensorIds = [ "memory/physical/applicationPercent" "memory/physical/bufferPercent" "memory/physical/cachePercent" "memory/swap/usedPercent" ];
};
}
# --- Applet 1017: GPU ---
{
name = "org.kde.plasma.systemmonitor.gpu";
position = { horizontal = 1696; vertical = 448; };
size = { width = 352; height = 208; };
config = {
Appearance = {
chartFace = "org.kde.ksysguard.linechart";
title = "GPU";
};
SensorColors = {
"gpu/gpu1/temp3" = "233,107,61";
"gpu/gpu1/usage" = "66,233,61";
"gpu/gpu1/usedVram" = "61,233,224";
};
SensorLabels = {
"gpu/gpu1/usage" = "GPU %";
"gpu/gpu1/usedVram" = "Memory";
"gpu/gpu1/temp3" = "Temperature";
};
Sensors = {
highPrioritySensorIds = [ "gpu/gpu1/usage" "gpu/gpu1/usedVram" ];
lowPrioritySensorIds = [ "gpu/gpu1/temp3" ];
};
};
}
# --- Applet 1018: Network ---
{
name = "org.kde.plasma.systemmonitor.network";
position = { horizontal = 1696; vertical = 880; };
size = { width = 352; height = 224; };
config = {
Appearance = {
chartFace = "org.kde.ksysguard.linechart";
title = "Network";
};
SensorColors = {
"network/all/download" = "89,233,61";
"network/all/upload" = "233,61,140";
};
Sensors = {
highPrioritySensorIds = [ "network/all/download" "network/all/upload" ];
};
};
}
# --- Applet 1020: CPU ---
{
name = "org.kde.plasma.systemmonitor.cpu";
position = { horizontal = 1696; vertical = 0; };
size = { width = 352; height = 224; };
config = {
Appearance = {
chartFace = "org.kde.ksysguard.linechart";
title = "CPU";
};
SensorColors = {
"cpu/all/averageFrequency" = "175,61,233";
"cpu/all/averageTemperature" = "74,61,233";
"cpu/all/usage" = "61,174,233";
};
SensorLabels = {
"cpu/all/averageFrequency" = "Frequency";
"cpu/all/averageTemperature" = "Temperature";
"cpu/loadaverages/loadaverage1" = "Load avg 1m";
"cpu/loadaverages/loadaverage15" = "Load avg 15m";
"cpu/loadaverages/loadaverage5" = "Load avg 5m";
"pressure/cpu/full10Sec" = "Pressure 10s";
};
Sensors.highPrioritySensorIds = [ "cpu/all/averageFrequency" "cpu/all/averageTemperature" ];
Sensors.lowPrioritySensorIds = [ "cpu/loadaverages/loadaverage1" "cpu/loadaverages/loadaverage5" "cpu/loadaverages/loadaverage15" "pressure/cpu/full10Sec" ];
};
}
weirdly, after generating appletsrc the contents look all right, but then after restarting plasma, the contents of appletsrc file seem to be somewhat messed up.
The issue seems to be fixed for me now, when restarting the system the widgets are loading as they should without needing to restart Plasma.
plasmashell 6.4.4
I don't know for others but something might have changed in KDE that fixed the issue, I don't know