SUMMARY STEPS TO REPRODUCE 1. Hide the panel. 2. Get close to the edge of the screen so that the hint shadow to be displayed. 3. Trigger an application start (like doing a printscreen) OBSERVED RESULT The shadow hint remains as a zombi popup similar to a graphic artifact. Hiding the panel again and restoring it using the edge touch, recovers this popup. SOFTWARE/OS VERSIONS Monitor resolution: 3840 x 2160 Linux/KDE Plasma: kwin_x11 5.14.90 KDE Plasma Version: 5.14.90 KDE Frameworks Version: 5.54.0 Qt Version: 5.12.0-3 Video driver: nvidia 415.25-8
Created attachment 117539 [details] Zombi hint shadow
This can be reproduced with plasma panels and as such I think it is KWin responsibility. 1. Add an empty plasma panel that Auto-Hide(s) 2. Add an application launcher in that panel that shows its popup with a shortcut e.g. Ctrl+Alt+S 3. Let the panel to hide itself 4. Approach to then panel edge without touching the edge but until the point to show the "KWin Edge Hint" 5. Trigger the panel showing with shortcut from step [2] 6. You can notice that the "KWin Edge Hint" is blocked afterwards until the panel hides itself and the user approaches that edge with its mouse
This is the "Screen Edge" effect.
A possibly relevant merge request was started @ https://invent.kde.org/plasma/kwin/-/merge_requests/4097
Git commit 3ea701743ec8cef02b4b221283459d62009d5520 by Vlad Zahorodnii, on behalf of David Edmundson. Committed on 25/05/2023 at 09:59. Pushed by vladz into branch 'master'. screen edge: Emit cleanup signals if needed on teardown The Effects API has one signal screenEdgeApproaching with effects monitoring the last signal to stay in sync. If an Edge is destroyed whilst visible, effects currently do not get notified and it can stay there forever. This patch emits screenEdgeApproaching if appropriate with a factor of 0 when an edge is destroyed. M +51 -22 autotests/integration/layershellv1window_test.cpp M +22 -0 autotests/integration/screenedges_test.cpp M +1 -0 src/screenedge.cpp https://invent.kde.org/plasma/kwin/-/commit/3ea701743ec8cef02b4b221283459d62009d5520
Git commit c89c892a0184204f69a37853ab6de2fa43acd2ff by Vlad Zahorodnii, on behalf of David Edmundson. Committed on 25/05/2023 at 10:01. Pushed by vladz into branch 'Plasma/5.27'. screen edge: Emit cleanup signals if needed on teardown The Effects API has one signal screenEdgeApproaching with effects monitoring the last signal to stay in sync. If an Edge is destroyed whilst visible, effects currently do not get notified and it can stay there forever. This patch emits screenEdgeApproaching if appropriate with a factor of 0 when an edge is destroyed. (cherry picked from commit 3ea701743ec8cef02b4b221283459d62009d5520) M +1 -0 src/screenedge.cpp https://invent.kde.org/plasma/kwin/-/commit/c89c892a0184204f69a37853ab6de2fa43acd2ff