STEPS TO REPRODUCE 1. Close any window (every window has a little random chance to be affected) 2. Sometimes it stays visible, but is not applicable, so it doesn't actually exist, but remains painted on the desktop Suspending kwin removes window's image from the desktop: qdbus org.kde.KWin /Compositor suspend qdbus org.kde.KWin /Compositor resume Operating System: KDE neon 5.17 KDE Plasma Version: 5.17.5 KDE Frameworks Version: 5.66.0 Qt Version: 5.13.2 Kernel Version: 5.0.0-37-generic OS Type: 64-bit Processors: 4 × Intel® Xeon® CPU E3-1225 V2 @ 3.20GHz Memory: 23,5 GiB of RAM Radeon 550 Series (POLARIS12, DRM 3.27.0, 5.0.0-37-generic, LLVM 8.0.0) 4.5 (Compatibility Profile) Mesa 19.0.8 Xsession, rendering backend - OpenGL 3.1 (will try 2.0) ADDITIONAL INFORMATION Close animation - Fade
Also never seen this before 5.17.5 upgrade
Never seen this FWIW.
Please attach output of `qdbus org.kde.KWin /KWin supportInformation` to this bug report.
If you can provide the information requested in comment 3, please add it.
Hello, that never happened to me again, so I'm not able to share more details. Maybe it was something related to cache. Anyway, it looks like the issue is gone.
Thanks for the update; changing status. If you see this again, please add a comment or reopen the ticket.
Created attachment 128834 [details] Discover window is shown after closing it
Hi, that happened again. Attaching screenshot and requested information. komorebi@komorebi-pc:~$ qdbus org.kde.KWin /KWin supportInformation KWin Support Information: The following information should be used when requesting support on e.g. https://forum.kde.org. It provides information about the currently running instance, which options are used, what OpenGL driver and which effects are running. Please post the information provided underneath this introductory text to a paste bin service like https://paste.kde.org instead of pasting into support threads. ========================== Version ======= KWin version: 5.18.5 Qt Version: 5.14.2 Qt compile version: 5.14.2 XCB compile version: 1.13 Operation Mode: X11 only Build Options ============= KWIN_BUILD_DECORATIONS: yes KWIN_BUILD_TABBOX: yes KWIN_BUILD_ACTIVITIES: yes HAVE_DRM: yes HAVE_GBM: yes HAVE_EGL_STREAMS: yes HAVE_X11_XCB: yes HAVE_EPOXY_GLX: yes HAVE_WAYLAND_EGL: yes X11 === Vendor: The X.Org Foundation Vendor Release: 12005000 Protocol Version/Revision: 11/0 SHAPE: yes; Version: 0x11 RANDR: yes; Version: 0x14 DAMAGE: yes; Version: 0x11 Composite: yes; Version: 0x4 RENDER: yes; Version: 0xb XFIXES: yes; Version: 0x50 SYNC: yes; Version: 0x31 GLX: yes; Version: 0x0 Decoration ========== Plugin: org.kde.kwin.aurorae Theme: __aurorae__svg__Breezemite Plugin recommends border size: No Blur: 1 onAllDesktopsAvailable: true alphaChannelSupported: true closeOnDoubleClickOnMenu: false decorationButtonsLeft: 5, 3, 4 decorationButtonsRight: borderSize: 3 gridUnit: 10 font: Noto Sans,10,-1,0,50,0,0,0,0,0,Regular smallSpacing: 2 largeSpacing: 10 Platform ========== Name: KWin::X11StandalonePlatform Options ======= focusPolicy: 0 nextFocusPrefersMouse: false clickRaise: true autoRaise: false autoRaiseInterval: 0 delayFocusInterval: 0 shadeHover: false shadeHoverInterval: 250 separateScreenFocus: false placement: 6 focusPolicyIsReasonable: true borderSnapZone: 10 windowSnapZone: 10 centerSnapZone: 0 snapOnlyWhenOverlapping: false rollOverDesktops: true focusStealingPreventionLevel: 0 operationTitlebarDblClick: 5000 operationMaxButtonLeftClick: 5000 operationMaxButtonMiddleClick: 5015 operationMaxButtonRightClick: 5014 commandActiveTitlebar1: 0 commandActiveTitlebar2: 28 commandActiveTitlebar3: 2 commandInactiveTitlebar1: 4 commandInactiveTitlebar2: 28 commandInactiveTitlebar3: 2 commandWindow1: 7 commandWindow2: 8 commandWindow3: 8 commandWindowWheel: 28 commandAll1: 10 commandAll2: 3 commandAll3: 14 keyCmdAllModKey: 16777251 showGeometryTip: false condensedTitle: false electricBorderMaximize: true electricBorderTiling: true electricBorderCornerRatio: 0.25 borderlessMaximizedWindows: true killPingTimeout: 5000 hideUtilityWindowsForInactive: true compositingMode: 1 useCompositing: true hiddenPreviews: 1 glSmoothScale: 2 xrenderSmoothScale: false maxFpsInterval: 16666666 refreshRate: 0 vBlankTime: 6000000 glStrictBinding: true glStrictBindingFollowsDriver: true glCoreProfile: true glPreferBufferSwap: 101 glPlatformInterface: 1 windowsBlockCompositing: true Screen Edges ============ desktopSwitching: false desktopSwitchingMovingClients: false cursorPushBackDistance: 1x1 timeThreshold: 150 reActivateThreshold: 350 actionTopLeft: 0 actionTop: 0 actionTopRight: 0 actionRight: 0 actionBottomRight: 0 actionBottom: 0 actionBottomLeft: 0 actionLeft: 0 Screens ======= Multi-Head: no Active screen follows mouse: no Number of Screens: 1 Screen 0: --------- Name: HDMI-A-0 Geometry: 0,0,1920x1080 Scale: 1 Refresh Rate: 60 Compositing =========== Compositing is active Compositing Type: OpenGL OpenGL vendor string: X.Org OpenGL renderer string: Radeon 550 Series (POLARIS12, DRM 3.33.0, 5.3.0-53-generic, LLVM 9.0.0) OpenGL version string: 4.5 (Compatibility Profile) Mesa 19.2.8 OpenGL platform interface: GLX OpenGL shading language version string: 4.50 Driver: RadeonSI GPU class: Arctic Islands OpenGL version: 4.5 GLSL version: 4.50 Mesa version: 19.2.8 X server version: 1.20.5 Linux kernel version: 5.3 Direct rendering: Requires strict binding: yes GLSL shaders: yes Texture NPOT support: yes Virtual Machine: no OpenGL 2 Shaders are used Painting blocks for vertical retrace: no Loaded Effects: --------------- zoom mouseclick slidingpopups kwin4_effect_login kwin4_effect_logout kwin4_effect_sessionquit kwin4_effect_windowaperture slide screenshot kwin4_effect_translucency flipswitch desktopgrid coverswitch colorpicker kwin4_effect_fadingpopups kwin4_effect_maximize kwin4_effect_squash kwin4_effect_fade kwin4_effect_frozenapp kwin4_effect_morphingpopups kwin4_effect_dialogparent presentwindows highlightwindow blur contrast startupfeedback screenedge kscreen Currently Active Effects: ------------------------- kwin4_effect_squash blur contrast Effect Settings: ---------------- zoom: zoomFactor: 1.2 mousePointer: 0 mouseTracking: 0 enableFocusTracking: false followFocus: true focusDelay: 350 moveFactor: 20 targetZoom: 1 mouseclick: color1: #8384b4 color2: #fefafe color3: #bce8f1 lineWidth: 18 ringLife: 500 ringSize: 60 ringCount: 1 showText: true font: Noto Sans,10,-1,0,50,0,0,0,0,0,Regular enabled: false slidingpopups: slideInDuration: 150 slideOutDuration: 250 kwin4_effect_login: isActiveFullScreenEffect: false kwin4_effect_logout: isActiveFullScreenEffect: false kwin4_effect_sessionquit: isActiveFullScreenEffect: false kwin4_effect_windowaperture: isActiveFullScreenEffect: false slide: duration: 500 horizontalGap: 45 verticalGap: 20 slideDocks: false slideBackground: true screenshot: kwin4_effect_translucency: isActiveFullScreenEffect: false flipswitch: tabBox: false tabBoxAlternative: false duration: 200 angle: 30 xPosition: 0.33000001311302185 yPosition: 1 windowTitle: true desktopgrid: zoomDuration: 300 border: 10 desktopNameAlignment: 0 layoutMode: 0 customLayoutRows: 2 usePresentWindows: true coverswitch: animationDuration: 200 animateSwitch: true animateStart: true animateStop: true reflection: true windowTitle: true zPosition: 900 primaryTabBox: false secondaryTabBox: false colorpicker: kwin4_effect_fadingpopups: isActiveFullScreenEffect: false kwin4_effect_maximize: isActiveFullScreenEffect: false kwin4_effect_squash: isActiveFullScreenEffect: false kwin4_effect_fade: isActiveFullScreenEffect: false kwin4_effect_frozenapp: isActiveFullScreenEffect: false kwin4_effect_morphingpopups: isActiveFullScreenEffect: false kwin4_effect_dialogparent: isActiveFullScreenEffect: false presentwindows: layoutMode: 0 showCaptions: true showIcons: true doNotCloseWindows: false ignoreMinimized: false accuracy: 20 fillGaps: true fadeDuration: 150 showPanel: false leftButtonWindow: 1 rightButtonWindow: 2 middleButtonWindow: 0 leftButtonDesktop: 2 middleButtonDesktop: 0 rightButtonDesktop: 0 highlightwindow: blur: contrast: startupfeedback: type: 0 screenedge: kscreen:
Can you please post the output of `qdbus org.kde.KWin /KWin supportInformation` when there is a zombie discover window?
Yep, already did that.
Hmm, okay. This one looks suspicious > Currently Active Effects: > ------------------------- > kwin4_effect_squash Have you tried disabling the squash effect?
and also the fade effect
The window was still there after disabling fade effect, but disappeared after disabling squash. I was testing it on the fly without restarting kwin.
Hmm, this is really strange... The squash effect animates minimized/unminimized windows. I had followed the instructions in STEPS TO REPRODUCE, but even after so many attempts, I haven't managed to reproduce the bug...
Yep, I haven't faced it for 3 months or so. This is a really rare thing.
Also cannot reproduce.
*** This bug has been marked as a duplicate of bug 441379 ***
*** This bug has been marked as a duplicate of bug 439332 ***