Bug 509205

Summary:	"No Windows" when clicking on an task in the KDE task manager with "Shows large window previews" and replicating another screen
Product:	[Plasma] plasmashell	Reporter:	Guillermo <guillermo>
Component:	Task Manager and Icons-Only Task Manager widgets	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	minor	CC:	guillermo, qydwhotmail
Priority:	NOR
Version First Reported In:	6.3.6
Target Milestone:	1.0
Platform:	Debian stable
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Guillermo 2025-09-06 18:30:28 UTC

Dear KDE team,

I found the following problem after upgrading from Debian Bookworm to Debian Trixie.

STEPS TO REPRODUCE / PRECONDITIONS
* A system with two screens (in the case that I tested, a laptop and an HDMI display).
* One screen replicates the other (in my case, the HDMI display replicated the laptops built-in screen).
* "Icons-Only Task Manager widgets" configured with behavior "Shows large window previews".
* There is an application with more than one windows open (for example, several Firefox windows).

OBSERVED RESULT

Clicking on the application's icon shows previews for all windows in one of the screens (the built-in screen in my case), and shows "No Windows" in the other (the HDMI display).

EXPECTED RESULT

Clicking on the application's icon shown the same previews for all windows in the replicated screen and the replicating screen.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Debian Trixie 13.0
KDE Plasma Version: 6.3.6
KDE Frameworks Version: 6.13
Qt Version: 6.8.2

Comment 1 Bug Janitor Service 2025-09-06 18:33:44 UTC

Thank you for the bug report!

Debian advises users to not submit bugs upstream (https://www.debian.org/Bugs/Reporting), and Plasma 6.3.6 is no longer eligible for support or maintenance from KDE. It's possible that the issue exists only in Debian at this point.

Could you report the bug to Debian using the report bug utility (https://packages.debian.org/stable/utils/reportbug)? If necessary, the maintainer of the package will forward the bug upstream.
Thanks for understanding!

Thanks again!

Comment 2 Guillermo 2025-09-07 11:24:54 UTC


*** This bug has been marked as a duplicate of bug 489849 ***