Bug 516132 - NetworkManager settings (MTU, IPv4, ...) do not take effect immediately after clicking "Apply"
Summary: NetworkManager settings (MTU, IPv4, ...) do not take effect immediately after...
Status: REPORTED
Alias: None
Product: systemsettings
Classification: Applications
Component: kcm_networkmanagement (other bugs)
Version First Reported In: unspecified
Platform: KDE Linux Linux
: NOR normal
Target Milestone: ---
Assignee: Plasma Bugs List
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2026-02-17 04:51 UTC by Mahdi Akrami
Modified: 2026-02-17 04:51 UTC (History)
1 user (show)

See Also:
Latest Commit:
Version Fixed/Implemented In:
Sentry Crash Report:


Attachments
STEPS TO REPRODUCE (2.84 MB, video/mp4)
2026-02-17 04:51 UTC, Mahdi Akrami
Details

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Description Mahdi Akrami 2026-02-17 04:51:22 UTC
Created attachment 189682 [details]
STEPS TO REPRODUCE

SUMMARY
In the Network Settings, modified parameters—such as the MTU size or manual IPv4 addresses—are saved but not applied to the active connection. The user must manually disconnect and reconnect the network interface for the changes to be reflected in the system.

STEPS TO REPRODUCE
1. Open System Settings and navigate to Wi-Fi & Internet.
2. Select an active Wired or Wi-Fi connection.
3. Change a setting (e.g., change IPv4 from Automatic to Manual and assign an IP, or change the MTU value).
4. Click the "Apply" button.
5. Check the interface status in the terminal (e.g., using 'ip addr' or 'ifconfig').

OBSERVED RESULT
The UI saves the settings, but the network interface continues to use the old configuration. The changes only apply after "Disconnect" and then "Connect" again.

EXPECTED RESULT
Clicking "Apply" should either automatically trigger a connection refresh or prompt the user that a reconnection is required to apply the new settings.

SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 43
KDE Plasma Version: 6.5.5
KDE Frameworks Version: 6.22.0
Qt Version: 6.10.1
Kernel Version: 6.18.9-200.fc43.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 8 × Intel® Core™ i5-8250U CPU @ 1.60GHz
Memory: 32 GB of RAM (31.1 GB usable)
Graphics Processor 1: Intel® UHD Graphics 620
Graphics Processor 2: AMD Radeon R5 M465 Series

ADDITIONAL INFORMATION