https://bugs.kde.org/show_bug.cgi?id=502411
Bug ID: 502411
Summary: System monitor-Network Monitor wrongly reports double
the true speed in bursts.
Classification: Plasma
Product: plasmashell
Version: master
Platform: NixOS
OS: Linux
Status: REPORTED
Severity: minor
Priority: NOR
Component: System Monitor widgets
Assignee: plasma-b...@kde.org
Reporter: aju...@gmail.com
CC: ahiems...@heimr.nl, notm...@gmail.com
Target Milestone: 1.0
Created attachment 180002
--> https://bugs.kde.org/attachment.cgi?id=180002&action=edit
Screenshot showing all tools and their readings.
SUMMARY
System Monitor reporting incorrect network speed for Some hardware while other
tools are reporting it correctly (atop and bmon).
STEPS TO REPRODUCE
1. (I am willing to help debug on my machine if you can provide instructions)
or Get an AQUANTIA AQC107 chip LAN Controller, 10G/5G/2.5G/1G/100Mbps RJ45 NIC
Card ( I got it off aliexpress for around 50CAD.
2. Start the download of a large file (or any network activity such as speed
measurement)
3. Open system monitor and look at history plot for network.
OBSERVED RESULT
Speed keeps going up and down and reaches double the actual value. For instance
if speed is 13MiB/s you will see 26MiB/s on and off pattern. The integral under
the curve might be correct but I am sure it is not real because using other
tools I am reading correct values consistently. Also If I do a speed test I
reach double the true maximum of the network adapter on one computer and the
real speed on another adapter on the other computer for the same test.
EXPECTED RESULT
I expect to see a smooth realistic plot of the true network speed as reported
by other tools atop and bmon for instance See picture for comparison. (note
that
SOFTWARE/OS VERSIONS
Operating System: NixOS 25.05 (Exact version below and here you can get the ISO
https://releases.nixos.org/nixos/unstable/nixos-25.05beta772522.1e5b653dff12)
KDE Plasma Version: 6.3.3
KDE Frameworks Version: 6.12.0
Qt Version: 6.8.2
Kernel Version: 6.13.7 (64-bit)
Graphics Platform: Wayland
Processors: 24 × 12th Gen Intel® Core™ i9-12900K
ADDITIONAL INFORMATION
"nixpkgs": {
"locked": {
"lastModified": 1742669843,
"narHash": "sha256-G5n+FOXLXcRx+3hCJ6Rt6ZQyF1zqQ0DL0sWAMn2Nk0w=",
"owner": "nixos",
"repo": "nixpkgs",
"rev": "1e5b653dff12029333a6546c11e108ede13052eb",
"type": "github"
}
}
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