SUMMARY *** If you create a panel at your desktop, and place it at the edge between both screens (make no different to which of the screens), each window you move "behind" the panel, will disappear. Of example (# = the vertical placement of the docker-panel) : | screen 1 #| screen 2 | (means at the right side of screen 1, screen 2 is right sided to screen 1) | screen 1 |# screen 2 | (means at the left side of screen 1, screen 2 is right sided to screen 1) *** STEPS TO REPRODUCE 1. create 2 screen setup 2. create ***vertical*** docker-panel, put `system-tray` widget to it 3. place the created Docker-Panel `screen 1 right sided`, or `screen 2 - left sided` OBSERVED RESULT 1. If `screen 1 - right sided`, move an open window (e.g. browserwindow) from Screen 1 to screen 2 (it will disappear, and you ar not able to open it in any way!!) 2. Remove the `vertical` docker-panel (the window will come back to screen. 3. This is reproducable all the time. EXPECTED RESULT Windows should work like expected. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Operating System: Manjaro Linux KDE Plasma Version: 5.23.4 KDE Frameworks Version: 5.89.0 Qt Version: 5.15.2 Kernel Version: 5.15.12-1-MANJARO (64-bit) Graphics Platform: X11 Processors: 8 × Intel® Core™ i7-3610QM CPU @ 2.30GHz Memory: 15,1 GiB of RAM Graphics Processor: Mesa DRI Intel® HD Graphics 4000 ADDITIONAL INFORMATION Here I made a video of the bug, because it might be hard to understand if only describe it with words: http://somup.com/c3VblmZrsp
Wow, what a strange bug. Very well-explained too. Moving to KWin since nothing in Plasma can make your windows disappear like that! I can't get it to happen in Plasma 5.24 in the Wayland session, but I might not be reproducing it in the exact same way; this sort of bug often manifests differently depending on hardware configurations. However we did make a lot of multiscreen improvements in Plasma 5.24, so it would be nice if it's fixed already! Would you be able to test it out: 1. In the Plasma Wayland session on Plasma 5.23.4, your current Plasma version 2. Upgrade to the Plasma 5.24 beta (or wait until the final release in a few weeks) and test it out again on the X11 session 3. Do the above again, but in the Wayland session Thanks!
(In reply to Nate Graham from comment #1) > Wow, what a strange bug. Very well-explained too. Moving to KWin since > nothing in Plasma can make your windows disappear like that! > > I can't get it to happen in Plasma 5.24 in the Wayland session, but I might > not be reproducing it in the exact same way; this sort of bug often > manifests differently depending on hardware configurations. However we did > make a lot of multiscreen improvements in Plasma 5.24, so it would be nice > if it's fixed already! > > Would you be able to test it out: > 1. In the Plasma Wayland session on Plasma 5.23.4, your current Plasma > version > 2. Upgrade to the Plasma 5.24 beta (or wait until the final release in a few > weeks) and test it out again on the X11 session > 3. Do the above again, but in the Wayland session > > Thanks! Thanks for the honor :) I'm also a Software Developer so I know how nice it is to have a deeply in detail described bug-issue ;) I don't have any experiences with Wayland. What is the way to switch between x11 and wayland?
On the SDDM login screen, there's a session chooser menu in the bottom-left corner. Click on it and you should see a session with "(Wayland)" in its name. Select that and then log in, and you'll be in a Wayland session! If you don't see it in the menu, it means that there's a missing package. Usually named something like plasma-wayland-session.
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Would love, if somebody else could give a helping hand with testing this.
Can't reproduce both on X11 and Wayland. Can you post the output of `qdbus org.kde.KWin /KWin supportInformation` when a window has disappeared?
Created attachment 146525 [details] qdbus-output Sure, here it is:
Any news for this Bug? Don't want to let this thread stale
Now it works, seems to be fixed with one of the last updates.