Bug 514796

Summary: Add a "Reset to Defaults" button to Display Configuration to reset the config to a good sane state
Product: [Applications] systemsettings Reporter: lcn
Component: kcm_kscreenAssignee: kscreen-bugs-null <kscreen-bugs-null>
Status: CONFIRMED ---    
Severity: wishlist CC: akselmo, kdedev, plasma-bugs-null
Priority: NOR    
Version First Reported In: 6.5.4   
Target Milestone: ---   
Platform: Other   
OS: Linux   
See Also: https://bugs.kde.org/show_bug.cgi?id=507702
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: Display Configuration page showing the issue

Description lcn 2026-01-18 17:20:37 UTC
Created attachment 188648 [details]
Display Configuration page showing the issue

SUMMARY
The Display Configuration page of the System Settings does not have a "Reset to Defaults" button, so if the config gets messed up somehow you might need to find the right file and edit it by hand. I don't know what I did, but this happened to me. The coordinates for one monitor were for some reason way too large and I couldn't drag it back using the Edit Arrangement functionality anymore. See attached screenshot. Took some poking and asking around to find ~/.config/kwinoutputconfig.json so I could edit the coordinates to reasonable values again.

STEPS TO REPRODUCE
I don't know how it happened, but I somehow ended up with "position": { "x": 2147482367, "y": 2147483647 } for one output in ~/.config/kwinoutputconfig.json

OBSERVED RESULT
There's no way to get the output into a usable state anymore using the config dialog.

EXPECTED RESULT
There should be a "Reset to Defaults" button that puts everything into a reasonable position again.

SOFTWARE/OS VERSIONS
KDE Plasma Version: 6.5.4
KDE Frameworks Version: 6.20.0
Qt Version: 6.10.1
Comment 1 Akseli Lahtinen 2026-01-19 12:21:42 UTC
If there's any way you can figure out how you got the positions in such state, let us know. You can create a separate bug report for it.

Thanks!
Comment 2 TraceyC 2026-01-30 13:59:09 UTC
Someone has reported the problem in bug 507702

Note: There is already a "Reset" button to revert changes made in the UI that haven't been applied
The feature would be to reset the display config to a known good state.
I'm marking this feature request confirmed, to pass it along to the kcm maintainers for consideration. Thanks!