Bug 502563

Summary:	Drag and drop doesn't work reliably with multiple monitors
Product:	[Plasma] kwin	Reporter:	andrew <fandrew>
Component:	Wayland drag-and-drop	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED WORKSFORME
Severity:	normal	CC:	nate
Priority:	NOR
Version First Reported In:	6.3.4
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description andrew 2025-04-08 13:22:11 UTC

SUMMARY

STEPS TO REPRODUCE
1. Open Firefox (just an example) on monitor A.
2. Open Dolphin (just an example) on monitor B.
2. Drag a file from Dolphin and drop it in Firefox.

OBSERVED RESULT
The file is not dropped into Firefox. You need to retry multiple times. If I drag and drop between Dolphin and Firefox on the same monitor, it always works. When using two monitors, it works only sometimes.

EXPECTED RESULT
It should work as expected.

Operating System: Arch Linux 
KDE Plasma Version: 6.3.4
KDE Frameworks Version: 6.12.0
Qt Version: 6.8.3
Kernel Version: 6.12.21-1-lts (64-bit)
Graphics Platform: Wayland
Processors: 20 × Intel® Core™ i5-14600K
Memory: 31.1 GiB of RAM
Graphics Processor: AMD Radeon RX 550 / 550 Series

Comment 1 Nate Graham 2025-04-08 16:35:17 UTC

When I test using those steps on git master, it works as expected for me. Admittedly I'm using Librewolf instead of Firefox, but it's a fork, so mostly the same thing.

Does this happen in a new clean user account on the same machine with no customization? Can you test?

Comment 2 andrew 2025-04-09 16:59:56 UTC

(In reply to Nate Graham from comment #1)
> When I test using those steps on git master, it works as expected for me.
> Admittedly I'm using Librewolf instead of Firefox, but it's a fork, so
> mostly the same thing.
> 
> Does this happen in a new clean user account on the same machine with no
> customization? Can you test?

It doesn't seem to reproduce on another user, however it happens as well in my colleague's pc which is next to me, we both use archlinux with the same version of kde but it has been happening for a long time.

at least i don't have any customization, i only have 125% scaling and black theme, i haven't installed plugins or done any kind of customization to kde.

it seems that the bug often reproduces more often after long hours of work.

Comment 3 Vlad Zahorodnii 2025-11-12 08:55:50 UTC

6.5 contained some dnd fixes specifically for Firefox. Is the issue still reproducible in 6.5?

Comment 4 Bug Janitor Service 2025-11-27 03:46:06 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.

Thank you for helping us make KDE software even better for everyone!

Comment 5 Bug Janitor Service 2025-12-12 03:46:16 UTC

🐛🧹 This bug has been in NEEDSINFO status with no change for at least 30 days. Closing as RESOLVED WORKSFORME.