SUMMARY Sometimes when I open more than 1 window of an app, and they're grouped together in the Icons-only Task Manager, the task manager icon is missing a green plus icon. STEPS TO REPRODUCE 1. Open more than 1 of an app. (Didn't find an exact procedure.) OBSERVED RESULT There is no plus icon on the task manager. It does not appear when closing windows (forgot to test opening windows). Hovering the icon in the task manager shows multiple previews as expected. EXPECTED RESULT Whenever multiple windows of an app are open, a plus icon is shown. SOFTWARE/OS VERSIONS Operating System: Arch Linux KDE Plasma Version: 5.23.3 KDE Frameworks Version: 5.87.0 Qt Version: 5.15.2 Kernel Version: 5.14.16-zen1-1-zen (64-bit) Graphics Platform: X11 Processors: 12 × AMD Ryzen 5 5600X 6-Core Processor Memory: 15.5 GiB of RAM Graphics Processor: NVIDIA GeForce GT 730/PCIe/SSE2 ADDITIONAL INFORMATION
1. Are you using the Breeze Plasma theme, or a different one? 2. Does it depend on the thickness of your panel? The next time you notice the plus icon is missing, can you try making your panel thicker or thinner and seeing if it spontaneously appears?
(In reply to Nate Graham from comment #1) > 1. Are you using the Breeze Plasma theme, or a different one? Breeze theme. > 2. Does it depend on the thickness of your panel? The next time you notice > the plus icon is missing, can you try making your panel thicker or thinner > and seeing if it spontaneously appears? Will try.
Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging If you have already provided the requested information, please mark the bug as REPORTED so that the KDE team knows that the bug is ready to be confirmed. Thank you for helping us make KDE software even better for everyone!
I'm not currently using Plasma, but will report back if I use Plasma and encounter this bug again.
Found reproducible instructions for one case of this bug: - Install Arch bsnes-plus (https://aur.archlinux.org/packages/bsnes-plus-git/). - Either run the bsnes-plus .desktop file, pick compatibility and click OK, or open a terminal and run bsnes-compatibility. - In bsnes-plus, optionally open a debugger or about dialog. - Run systemctl --user restart plasma-plasmashell. - If you didn't open a dialog earlier, do so now. The + icon is missing from the taskbar icon. Closing and opening bsnes-plus's dialogs does not make it appear. Changing panel height from 44 to 46, then leaving edit mode, did not make the + icon reappear. Closing and reopening bsnes-plus did. I also observed that starting and stopping bsnes-plus causes my taskbar pinned icons to reorder themselves. This may be a separate bug?
*** Bug 456685 has been marked as a duplicate of this bug. ***
*** Bug 456822 has been marked as a duplicate of this bug. ***
It's probably worthwhile for someone (possibly me in the future) to run plasmashell with QML debugging enabled (eg. https://doc.qt.io/qtcreator/creator-debugging-qml.html), then once the bug happens, attach Qt Creator using QML debugging and gdb to inspect what went wrong in the plasmashell state. But I'm currently too tired/overwhelmed and busy with other projects, to spend time debugging plasmashell's complex QML state.
Any progress?? This is tremendously annoying, as are a few other issues that render KDE almost unusable, and yet have remained unfixed for months if not years.
Created attachment 171654 [details] Bug appearing with Firefox I am also seeing this across multiple computers. I usually notice it with Firefox (installed via Flatpak). I may try nyanpasu64's suggestion of trying to debug the issue with plasmashell but no guarantees as I don't have any experience with that.