Bug 509390

Summary: After changing display configuration and adding second display, Primary selector does not show up
Product: [Applications] systemsettings Reporter: php4fan
Component: kcm_kscreenAssignee: kscreen-bugs-null <kscreen-bugs-null>
Status: RESOLVED WORKSFORME    
Severity: normal CC: kde, nate, plasma-bugs-null
Priority: NOR Keywords: multiscreen
Version First Reported In: 6.3.6   
Target Milestone: ---   
Platform: Manjaro   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description php4fan 2025-09-11 17:45:05 UTC 
I mentioned this in https://bugs.kde.org/show_bug.cgi?id=509388 but it deserves its own report, as it's not directly related.

STEPS TO REPRODUCE
1.  On a laptop, begin with a configuration where you have one external monitor set up as the only enabled display, while the laptop's built-in one is disabled
2. Open Display Configuration
3. In the dropdown where the available displays are listed, select the Built-in one
4. Check the "Enabled" checkbox
5. Apply the changes

OBSERVED RESULT
At no point, not even after applying the setting changes, and not even after you click the "Keep" button in the popup, does the "Primary" selector show up. There is NO WAY of changing (or even checking) which display is the primary one, unless you close and reopen the Display Settings.


EXPECTED RESULT
The "Primary" selector should show up as soon as you check the Enabled checkbox. As soon as you have two screens that you can configure (and both are shown in the preview at the top), you should be able to select which one you want as the primary one, before finally applying the changes. You shouldn't have to apply the changes before you can change that, and certainly you shouldn't have to close and reopen the display settings after having applied the changes.

SOFTWARE/OS VERSIONS
Operating System: Manjaro Linux 
KDE Plasma Version: 6.3.6
KDE Frameworks Version: 6.17.0
Qt Version: 6.9.1
Kernel Version: 6.6.101-1-MANJARO (64-bit)
Graphics Platform: Wayland
Processors: 12 × 12th Gen Intel® Core™ i7-1255U
Memory: 15.3 GiB of RAM
Graphics Processor: Intel® Iris® Xe Graphics
Manufacturer: ASUSTeK COMPUTER INC.
Product Name: Vivobook_ASUSLaptop X1502ZA_F1502ZA
System Version: 1.0
Comment 1 php4fan 2025-09-11 17:46:55 UTC 
I've just found out that if you check "Enabled", then uncheck it, then check it again, then the Primary radio button appears. So that's the workaround.
Comment 2 Nate Graham 2025-09-19 13:50:21 UTC 
I can't reproduce this issue with the steps provided. It may have already been fixed for Plasma 6.5. Could you take a screen recording that shows the Display Configuration page in System Settings as you make these changes? Thanks!
Comment 3 Bug Janitor Service 2025-10-04 03:46:30 UTC 
🐛🧹 ⚠️ This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information, then set the bug status to REPORTED. If there is no change for at least 30 days, it will be automatically closed as RESOLVED WORKSFORME.

For more information about our bug triaging procedures, please read https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging.

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Comment 4 Bug Janitor Service 2025-10-19 03:47:22 UTC 
🐛🧹 This bug has been in NEEDSINFO status with no change for at least 30 days. Closing as RESOLVED WORKSFORME.