Bug 509115

Summary:	Unreal Engine Blueprints right click search menu
Product:	[Plasma] kwin	Reporter:	Znmop <mihai4games>
Component:	general	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	REPORTED ---
Severity:	normal	CC:	kdedev, nate, xaver.hugl
Priority:	NOR
Version First Reported In:	6.4.4
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Znmop 2025-09-04 17:17:26 UTC

SUMMARY
It's not possible to type inside the popup search window inside blueprints unless you give Legacy X11 App Support always permission.
https://discuss.kde.org/t/enhancement-request-better-x11-keystroke-compatibility-for-professional-software/36825
https://forums.unrealengine.com/t/i-cannot-type-inside-the-blueprint-action-window/2078805
https://forums.unrealengine.com/t/unreal-engine-5-x-under-linux-search-in-blueprints-not-working/782597/4
https://forums.unrealengine.com/t/ue5-3-cannot-input-text-find-function-on-linux-wayland/1799561/5

STEPS TO REPRODUCE
1.  Open any blueprint
2.  Right click to open search menu
3.  Type inside the window without relying on any gimmick that forces the popup window to gain focus

OBSERVED RESULT
Nothing gets typed in the search bar

EXPECTED RESULT
Letters/numbers appearing inside the menu

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma: 
KDE Plasma Version: 6.4.4
KDE Frameworks Version: 6.17.0
Qt Version: 6.9.2

ADDITIONAL INFORMATION
Some users have found several gimmicks to circumvent this problem such as moving the cursor to the top left and then selecting the editor or right click inside the search box then left click to regain focus.

Comment 1 TraceyC 2025-09-16 01:00:45 UTC

Moving to kwin, which is responsible for UI windows

Comment 2 Zamundaaa 2025-09-16 15:37:05 UTC

Please report this issue to Unreal engine. As a Wayland native application, you're not supposed to use X11 for anything... especially not for input while the window in question is not focused.

Comment 3 Zamundaaa 2025-09-16 16:01:04 UTC

Hmm, sorry, I was corrected, UE is still an X11 app. I can't explain the bug in that case though.

Comment 4 Nate Graham 2025-09-16 22:22:01 UTC

Seems like it's still an app bug, no?

Comment 5 Zamundaaa 2025-09-22 12:14:25 UTC

Could be, but we need more information to be sure.